607 строки
16 KiB
C
607 строки
16 KiB
C
/*
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* Sonics Silicon Backplane
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* SDIO-Hostbus related functions
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*
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* Copyright 2009 Albert Herranz <albert_herranz@yahoo.es>
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*
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* Based on drivers/ssb/pcmcia.c
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* Copyright 2006 Johannes Berg <johannes@sipsolutions.net>
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* Copyright 2007-2008 Michael Buesch <m@bues.ch>
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*
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* Licensed under the GNU/GPL. See COPYING for details.
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*
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*/
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#include <linux/ssb/ssb.h>
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#include <linux/delay.h>
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#include <linux/io.h>
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#include <linux/etherdevice.h>
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#include <linux/mmc/sdio_func.h>
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#include "ssb_private.h"
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/* Define the following to 1 to enable a printk on each coreswitch. */
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#define SSB_VERBOSE_SDIOCORESWITCH_DEBUG 0
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/* Hardware invariants CIS tuples */
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#define SSB_SDIO_CIS 0x80
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#define SSB_SDIO_CIS_SROMREV 0x00
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#define SSB_SDIO_CIS_ID 0x01
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#define SSB_SDIO_CIS_BOARDREV 0x02
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#define SSB_SDIO_CIS_PA 0x03
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#define SSB_SDIO_CIS_PA_PA0B0_LO 0
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#define SSB_SDIO_CIS_PA_PA0B0_HI 1
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#define SSB_SDIO_CIS_PA_PA0B1_LO 2
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#define SSB_SDIO_CIS_PA_PA0B1_HI 3
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#define SSB_SDIO_CIS_PA_PA0B2_LO 4
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#define SSB_SDIO_CIS_PA_PA0B2_HI 5
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#define SSB_SDIO_CIS_PA_ITSSI 6
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#define SSB_SDIO_CIS_PA_MAXPOW 7
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#define SSB_SDIO_CIS_OEMNAME 0x04
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#define SSB_SDIO_CIS_CCODE 0x05
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#define SSB_SDIO_CIS_ANTENNA 0x06
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#define SSB_SDIO_CIS_ANTGAIN 0x07
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#define SSB_SDIO_CIS_BFLAGS 0x08
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#define SSB_SDIO_CIS_LEDS 0x09
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#define CISTPL_FUNCE_LAN_NODE_ID 0x04 /* same as in PCMCIA */
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/*
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* Function 1 miscellaneous registers.
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*
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* Definitions match src/include/sbsdio.h from the
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* Android Open Source Project
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* http://android.git.kernel.org/?p=platform/system/wlan/broadcom.git
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*
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*/
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#define SBSDIO_FUNC1_SBADDRLOW 0x1000a /* SB Address window Low (b15) */
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#define SBSDIO_FUNC1_SBADDRMID 0x1000b /* SB Address window Mid (b23-b16) */
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#define SBSDIO_FUNC1_SBADDRHIGH 0x1000c /* SB Address window High (b24-b31) */
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/* valid bits in SBSDIO_FUNC1_SBADDRxxx regs */
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#define SBSDIO_SBADDRLOW_MASK 0x80 /* Valid address bits in SBADDRLOW */
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#define SBSDIO_SBADDRMID_MASK 0xff /* Valid address bits in SBADDRMID */
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#define SBSDIO_SBADDRHIGH_MASK 0xff /* Valid address bits in SBADDRHIGH */
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#define SBSDIO_SB_OFT_ADDR_MASK 0x7FFF /* sb offset addr is <= 15 bits, 32k */
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/* REVISIT: this flag doesn't seem to matter */
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#define SBSDIO_SB_ACCESS_2_4B_FLAG 0x8000 /* forces 32-bit SB access */
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/*
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* Address map within the SDIO function address space (128K).
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*
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* Start End Description
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* ------- ------- ------------------------------------------
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* 0x00000 0x0ffff selected backplane address window (64K)
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* 0x10000 0x1ffff backplane control registers (max 64K)
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*
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* The current address window is configured by writing to registers
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* SBADDRLOW, SBADDRMID and SBADDRHIGH.
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*
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* In order to access the contents of a 32-bit Silicon Backplane address
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* the backplane address window must be first loaded with the highest
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* 16 bits of the target address. Then, an access must be done to the
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* SDIO function address space using the lower 15 bits of the address.
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* Bit 15 of the address must be set when doing 32 bit accesses.
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*
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* 10987654321098765432109876543210
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* WWWWWWWWWWWWWWWWW SB Address Window
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* OOOOOOOOOOOOOOOO Offset within SB Address Window
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* a 32-bit access flag
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*/
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/*
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* SSB I/O via SDIO.
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*
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* NOTE: SDIO address @addr is 17 bits long (SDIO address space is 128K).
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*/
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static inline struct device *ssb_sdio_dev(struct ssb_bus *bus)
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{
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return &bus->host_sdio->dev;
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}
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/* host claimed */
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static int ssb_sdio_writeb(struct ssb_bus *bus, unsigned int addr, u8 val)
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{
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int error = 0;
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sdio_writeb(bus->host_sdio, val, addr, &error);
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if (unlikely(error)) {
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dev_dbg(ssb_sdio_dev(bus), "%08X <- %02x, error %d\n",
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addr, val, error);
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}
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return error;
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}
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#if 0
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static u8 ssb_sdio_readb(struct ssb_bus *bus, unsigned int addr)
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{
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u8 val;
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int error = 0;
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val = sdio_readb(bus->host_sdio, addr, &error);
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if (unlikely(error)) {
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dev_dbg(ssb_sdio_dev(bus), "%08X -> %02x, error %d\n",
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addr, val, error);
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}
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return val;
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}
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#endif
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/* host claimed */
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static int ssb_sdio_set_sbaddr_window(struct ssb_bus *bus, u32 address)
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{
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int error;
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error = ssb_sdio_writeb(bus, SBSDIO_FUNC1_SBADDRLOW,
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(address >> 8) & SBSDIO_SBADDRLOW_MASK);
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if (error)
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goto out;
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error = ssb_sdio_writeb(bus, SBSDIO_FUNC1_SBADDRMID,
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(address >> 16) & SBSDIO_SBADDRMID_MASK);
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if (error)
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goto out;
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error = ssb_sdio_writeb(bus, SBSDIO_FUNC1_SBADDRHIGH,
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(address >> 24) & SBSDIO_SBADDRHIGH_MASK);
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if (error)
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goto out;
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bus->sdio_sbaddr = address;
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out:
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if (error) {
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dev_dbg(ssb_sdio_dev(bus), "failed to set address window"
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" to 0x%08x, error %d\n", address, error);
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}
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return error;
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}
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/* for enumeration use only */
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u32 ssb_sdio_scan_read32(struct ssb_bus *bus, u16 offset)
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{
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u32 val;
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int error;
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sdio_claim_host(bus->host_sdio);
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val = sdio_readl(bus->host_sdio, offset, &error);
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sdio_release_host(bus->host_sdio);
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if (unlikely(error)) {
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dev_dbg(ssb_sdio_dev(bus), "%04X:%04X > %08x, error %d\n",
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bus->sdio_sbaddr >> 16, offset, val, error);
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}
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return val;
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}
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/* for enumeration use only */
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int ssb_sdio_scan_switch_coreidx(struct ssb_bus *bus, u8 coreidx)
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{
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u32 sbaddr;
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int error;
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sbaddr = (coreidx * SSB_CORE_SIZE) + SSB_ENUM_BASE;
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sdio_claim_host(bus->host_sdio);
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error = ssb_sdio_set_sbaddr_window(bus, sbaddr);
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sdio_release_host(bus->host_sdio);
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if (error) {
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dev_err(ssb_sdio_dev(bus), "failed to switch to core %u,"
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" error %d\n", coreidx, error);
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goto out;
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}
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out:
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return error;
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}
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/* host must be already claimed */
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static int ssb_sdio_switch_core(struct ssb_bus *bus, struct ssb_device *dev)
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{
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u8 coreidx = dev->core_index;
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u32 sbaddr;
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int error = 0;
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sbaddr = (coreidx * SSB_CORE_SIZE) + SSB_ENUM_BASE;
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if (unlikely(bus->sdio_sbaddr != sbaddr)) {
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#if SSB_VERBOSE_SDIOCORESWITCH_DEBUG
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dev_info(ssb_sdio_dev(bus),
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"switching to %s core, index %d\n",
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ssb_core_name(dev->id.coreid), coreidx);
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#endif
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error = ssb_sdio_set_sbaddr_window(bus, sbaddr);
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if (error) {
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dev_dbg(ssb_sdio_dev(bus), "failed to switch to"
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" core %u, error %d\n", coreidx, error);
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goto out;
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}
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bus->mapped_device = dev;
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}
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out:
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return error;
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}
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static u8 ssb_sdio_read8(struct ssb_device *dev, u16 offset)
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{
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struct ssb_bus *bus = dev->bus;
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u8 val = 0xff;
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int error = 0;
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sdio_claim_host(bus->host_sdio);
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if (unlikely(ssb_sdio_switch_core(bus, dev)))
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goto out;
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offset |= bus->sdio_sbaddr & 0xffff;
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offset &= SBSDIO_SB_OFT_ADDR_MASK;
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val = sdio_readb(bus->host_sdio, offset, &error);
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if (error) {
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dev_dbg(ssb_sdio_dev(bus), "%04X:%04X > %02x, error %d\n",
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bus->sdio_sbaddr >> 16, offset, val, error);
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}
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out:
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sdio_release_host(bus->host_sdio);
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return val;
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}
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static u16 ssb_sdio_read16(struct ssb_device *dev, u16 offset)
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{
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struct ssb_bus *bus = dev->bus;
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u16 val = 0xffff;
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int error = 0;
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sdio_claim_host(bus->host_sdio);
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if (unlikely(ssb_sdio_switch_core(bus, dev)))
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goto out;
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offset |= bus->sdio_sbaddr & 0xffff;
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offset &= SBSDIO_SB_OFT_ADDR_MASK;
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val = sdio_readw(bus->host_sdio, offset, &error);
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if (error) {
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dev_dbg(ssb_sdio_dev(bus), "%04X:%04X > %04x, error %d\n",
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bus->sdio_sbaddr >> 16, offset, val, error);
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}
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out:
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sdio_release_host(bus->host_sdio);
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return val;
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}
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static u32 ssb_sdio_read32(struct ssb_device *dev, u16 offset)
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{
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struct ssb_bus *bus = dev->bus;
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u32 val = 0xffffffff;
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int error = 0;
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sdio_claim_host(bus->host_sdio);
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if (unlikely(ssb_sdio_switch_core(bus, dev)))
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goto out;
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offset |= bus->sdio_sbaddr & 0xffff;
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offset &= SBSDIO_SB_OFT_ADDR_MASK;
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offset |= SBSDIO_SB_ACCESS_2_4B_FLAG; /* 32 bit data access */
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val = sdio_readl(bus->host_sdio, offset, &error);
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if (error) {
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dev_dbg(ssb_sdio_dev(bus), "%04X:%04X > %08x, error %d\n",
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bus->sdio_sbaddr >> 16, offset, val, error);
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}
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out:
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sdio_release_host(bus->host_sdio);
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return val;
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}
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#ifdef CONFIG_SSB_BLOCKIO
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static void ssb_sdio_block_read(struct ssb_device *dev, void *buffer,
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size_t count, u16 offset, u8 reg_width)
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{
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size_t saved_count = count;
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struct ssb_bus *bus = dev->bus;
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int error = 0;
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sdio_claim_host(bus->host_sdio);
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if (unlikely(ssb_sdio_switch_core(bus, dev))) {
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error = -EIO;
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memset(buffer, 0xff, count);
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goto err_out;
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}
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offset |= bus->sdio_sbaddr & 0xffff;
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offset &= SBSDIO_SB_OFT_ADDR_MASK;
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switch (reg_width) {
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case sizeof(u8): {
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error = sdio_readsb(bus->host_sdio, buffer, offset, count);
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break;
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}
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case sizeof(u16): {
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SSB_WARN_ON(count & 1);
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error = sdio_readsb(bus->host_sdio, buffer, offset, count);
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break;
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}
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case sizeof(u32): {
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SSB_WARN_ON(count & 3);
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offset |= SBSDIO_SB_ACCESS_2_4B_FLAG; /* 32 bit data access */
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error = sdio_readsb(bus->host_sdio, buffer, offset, count);
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break;
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}
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default:
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SSB_WARN_ON(1);
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}
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if (!error)
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goto out;
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err_out:
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dev_dbg(ssb_sdio_dev(bus), "%04X:%04X (width=%u, len=%zu), error %d\n",
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bus->sdio_sbaddr >> 16, offset, reg_width, saved_count, error);
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out:
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sdio_release_host(bus->host_sdio);
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}
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#endif /* CONFIG_SSB_BLOCKIO */
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static void ssb_sdio_write8(struct ssb_device *dev, u16 offset, u8 val)
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{
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struct ssb_bus *bus = dev->bus;
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int error = 0;
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sdio_claim_host(bus->host_sdio);
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if (unlikely(ssb_sdio_switch_core(bus, dev)))
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goto out;
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offset |= bus->sdio_sbaddr & 0xffff;
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offset &= SBSDIO_SB_OFT_ADDR_MASK;
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sdio_writeb(bus->host_sdio, val, offset, &error);
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if (error) {
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dev_dbg(ssb_sdio_dev(bus), "%04X:%04X < %02x, error %d\n",
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bus->sdio_sbaddr >> 16, offset, val, error);
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}
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out:
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sdio_release_host(bus->host_sdio);
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}
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static void ssb_sdio_write16(struct ssb_device *dev, u16 offset, u16 val)
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{
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struct ssb_bus *bus = dev->bus;
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int error = 0;
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sdio_claim_host(bus->host_sdio);
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if (unlikely(ssb_sdio_switch_core(bus, dev)))
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goto out;
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offset |= bus->sdio_sbaddr & 0xffff;
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offset &= SBSDIO_SB_OFT_ADDR_MASK;
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sdio_writew(bus->host_sdio, val, offset, &error);
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if (error) {
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dev_dbg(ssb_sdio_dev(bus), "%04X:%04X < %04x, error %d\n",
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bus->sdio_sbaddr >> 16, offset, val, error);
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}
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out:
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sdio_release_host(bus->host_sdio);
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}
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static void ssb_sdio_write32(struct ssb_device *dev, u16 offset, u32 val)
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{
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struct ssb_bus *bus = dev->bus;
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int error = 0;
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sdio_claim_host(bus->host_sdio);
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if (unlikely(ssb_sdio_switch_core(bus, dev)))
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goto out;
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offset |= bus->sdio_sbaddr & 0xffff;
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offset &= SBSDIO_SB_OFT_ADDR_MASK;
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offset |= SBSDIO_SB_ACCESS_2_4B_FLAG; /* 32 bit data access */
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sdio_writel(bus->host_sdio, val, offset, &error);
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if (error) {
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dev_dbg(ssb_sdio_dev(bus), "%04X:%04X < %08x, error %d\n",
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bus->sdio_sbaddr >> 16, offset, val, error);
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}
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if (bus->quirks & SSB_QUIRK_SDIO_READ_AFTER_WRITE32)
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sdio_readl(bus->host_sdio, 0, &error);
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out:
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sdio_release_host(bus->host_sdio);
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}
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#ifdef CONFIG_SSB_BLOCKIO
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static void ssb_sdio_block_write(struct ssb_device *dev, const void *buffer,
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size_t count, u16 offset, u8 reg_width)
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{
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size_t saved_count = count;
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struct ssb_bus *bus = dev->bus;
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int error = 0;
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sdio_claim_host(bus->host_sdio);
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if (unlikely(ssb_sdio_switch_core(bus, dev))) {
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error = -EIO;
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memset((void *)buffer, 0xff, count);
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goto err_out;
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}
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offset |= bus->sdio_sbaddr & 0xffff;
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offset &= SBSDIO_SB_OFT_ADDR_MASK;
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switch (reg_width) {
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case sizeof(u8):
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error = sdio_writesb(bus->host_sdio, offset,
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(void *)buffer, count);
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break;
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case sizeof(u16):
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SSB_WARN_ON(count & 1);
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error = sdio_writesb(bus->host_sdio, offset,
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(void *)buffer, count);
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break;
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case sizeof(u32):
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SSB_WARN_ON(count & 3);
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offset |= SBSDIO_SB_ACCESS_2_4B_FLAG; /* 32 bit data access */
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error = sdio_writesb(bus->host_sdio, offset,
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(void *)buffer, count);
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break;
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default:
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SSB_WARN_ON(1);
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}
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if (!error)
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goto out;
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err_out:
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dev_dbg(ssb_sdio_dev(bus), "%04X:%04X (width=%u, len=%zu), error %d\n",
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bus->sdio_sbaddr >> 16, offset, reg_width, saved_count, error);
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out:
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sdio_release_host(bus->host_sdio);
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}
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#endif /* CONFIG_SSB_BLOCKIO */
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/* Not "static", as it's used in main.c */
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const struct ssb_bus_ops ssb_sdio_ops = {
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.read8 = ssb_sdio_read8,
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.read16 = ssb_sdio_read16,
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.read32 = ssb_sdio_read32,
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.write8 = ssb_sdio_write8,
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.write16 = ssb_sdio_write16,
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.write32 = ssb_sdio_write32,
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#ifdef CONFIG_SSB_BLOCKIO
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.block_read = ssb_sdio_block_read,
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.block_write = ssb_sdio_block_write,
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#endif
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};
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#define GOTO_ERROR_ON(condition, description) do { \
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if (unlikely(condition)) { \
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error_description = description; \
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goto error; \
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} \
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} while (0)
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int ssb_sdio_get_invariants(struct ssb_bus *bus,
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struct ssb_init_invariants *iv)
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{
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struct ssb_sprom *sprom = &iv->sprom;
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struct ssb_boardinfo *bi = &iv->boardinfo;
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const char *error_description = "none";
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struct sdio_func_tuple *tuple;
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void *mac;
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memset(sprom, 0xFF, sizeof(*sprom));
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sprom->boardflags_lo = 0;
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sprom->boardflags_hi = 0;
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tuple = bus->host_sdio->tuples;
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while (tuple) {
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switch (tuple->code) {
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case 0x22: /* extended function */
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switch (tuple->data[0]) {
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case CISTPL_FUNCE_LAN_NODE_ID:
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GOTO_ERROR_ON((tuple->size != 7) &&
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(tuple->data[1] != 6),
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"mac tpl size");
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/* fetch the MAC address. */
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mac = tuple->data + 2;
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memcpy(sprom->il0mac, mac, ETH_ALEN);
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memcpy(sprom->et1mac, mac, ETH_ALEN);
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break;
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default:
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break;
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}
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break;
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case 0x80: /* vendor specific tuple */
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switch (tuple->data[0]) {
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case SSB_SDIO_CIS_SROMREV:
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GOTO_ERROR_ON(tuple->size != 2,
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"sromrev tpl size");
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sprom->revision = tuple->data[1];
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break;
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case SSB_SDIO_CIS_ID:
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GOTO_ERROR_ON((tuple->size != 5) &&
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(tuple->size != 7),
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"id tpl size");
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bi->vendor = tuple->data[1] |
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(tuple->data[2]<<8);
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break;
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case SSB_SDIO_CIS_BOARDREV:
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GOTO_ERROR_ON(tuple->size != 2,
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"boardrev tpl size");
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sprom->board_rev = tuple->data[1];
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break;
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case SSB_SDIO_CIS_PA:
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GOTO_ERROR_ON((tuple->size != 9) &&
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(tuple->size != 10),
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"pa tpl size");
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sprom->pa0b0 = tuple->data[1] |
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((u16)tuple->data[2] << 8);
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sprom->pa0b1 = tuple->data[3] |
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((u16)tuple->data[4] << 8);
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sprom->pa0b2 = tuple->data[5] |
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((u16)tuple->data[6] << 8);
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sprom->itssi_a = tuple->data[7];
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sprom->itssi_bg = tuple->data[7];
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sprom->maxpwr_a = tuple->data[8];
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sprom->maxpwr_bg = tuple->data[8];
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break;
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case SSB_SDIO_CIS_OEMNAME:
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/* Not present */
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break;
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case SSB_SDIO_CIS_CCODE:
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GOTO_ERROR_ON(tuple->size != 2,
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"ccode tpl size");
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sprom->country_code = tuple->data[1];
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break;
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case SSB_SDIO_CIS_ANTENNA:
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GOTO_ERROR_ON(tuple->size != 2,
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"ant tpl size");
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sprom->ant_available_a = tuple->data[1];
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sprom->ant_available_bg = tuple->data[1];
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break;
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case SSB_SDIO_CIS_ANTGAIN:
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GOTO_ERROR_ON(tuple->size != 2,
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"antg tpl size");
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sprom->antenna_gain.a0 = tuple->data[1];
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sprom->antenna_gain.a1 = tuple->data[1];
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sprom->antenna_gain.a2 = tuple->data[1];
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sprom->antenna_gain.a3 = tuple->data[1];
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break;
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case SSB_SDIO_CIS_BFLAGS:
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GOTO_ERROR_ON((tuple->size != 3) &&
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(tuple->size != 5),
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"bfl tpl size");
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sprom->boardflags_lo = tuple->data[1] |
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((u16)tuple->data[2] << 8);
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break;
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case SSB_SDIO_CIS_LEDS:
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GOTO_ERROR_ON(tuple->size != 5,
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"leds tpl size");
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sprom->gpio0 = tuple->data[1];
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sprom->gpio1 = tuple->data[2];
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sprom->gpio2 = tuple->data[3];
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sprom->gpio3 = tuple->data[4];
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break;
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default:
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break;
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}
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break;
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default:
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break;
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}
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tuple = tuple->next;
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}
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return 0;
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error:
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dev_err(ssb_sdio_dev(bus), "failed to fetch device invariants: %s\n",
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error_description);
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return -ENODEV;
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}
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void ssb_sdio_exit(struct ssb_bus *bus)
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{
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if (bus->bustype != SSB_BUSTYPE_SDIO)
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return;
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/* Nothing to do here. */
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}
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int ssb_sdio_init(struct ssb_bus *bus)
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{
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if (bus->bustype != SSB_BUSTYPE_SDIO)
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return 0;
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bus->sdio_sbaddr = ~0;
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return 0;
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}
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