From a5e0691fd9f610eb46ab4cd070fa7b08ee780bf4 Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Mon, 27 Jul 2020 15:05:01 +0200 Subject: [PATCH] tty/synclink: remove leftover bits of non-PCI card support Since commit 1355cba9c3ba ("tty/synclink: remove ISA support"), the synlink driver only supports PCI card. Remove any leftover dead code to support other cards. Signed-off-by: Christoph Hellwig Link: https://lore.kernel.org/r/20200727130501.31005-1-hch@lst.de Signed-off-by: Greg Kroah-Hartman --- drivers/tty/synclink.c | 350 +++++++++++++---------------------------- 1 file changed, 109 insertions(+), 241 deletions(-) diff --git a/drivers/tty/synclink.c b/drivers/tty/synclink.c index 08d2976593d5..0dba40eace46 100644 --- a/drivers/tty/synclink.c +++ b/drivers/tty/synclink.c @@ -252,7 +252,6 @@ struct mgsl_struct { char device_name[25]; /* device instance name */ - unsigned int bus_type; /* expansion bus type (ISA,EISA,PCI) */ unsigned char bus; /* expansion bus number (zero based) */ unsigned char function; /* PCI device number */ @@ -3432,15 +3431,9 @@ static inline void line_info(struct seq_file *m, struct mgsl_struct *info) char stat_buf[30]; unsigned long flags; - if (info->bus_type == MGSL_BUS_TYPE_PCI) { - seq_printf(m, "%s:PCI io:%04X irq:%d mem:%08X lcr:%08X", - info->device_name, info->io_base, info->irq_level, - info->phys_memory_base, info->phys_lcr_base); - } else { - seq_printf(m, "%s:(E)ISA io:%04X irq:%d dma:%d", - info->device_name, info->io_base, - info->irq_level, info->dma_level); - } + seq_printf(m, "%s:PCI io:%04X irq:%d mem:%08X lcr:%08X", + info->device_name, info->io_base, info->irq_level, + info->phys_memory_base, info->phys_lcr_base); /* output current serial signal states */ spin_lock_irqsave(&info->irq_spinlock,flags); @@ -3556,54 +3549,27 @@ static int mgsl_allocate_dma_buffers(struct mgsl_struct *info) if ( info->max_frame_size % DMABUFFERSIZE ) BuffersPerFrame++; - if ( info->bus_type == MGSL_BUS_TYPE_PCI ) { - /* - * The PCI adapter has 256KBytes of shared memory to use. - * This is 64 PAGE_SIZE buffers. - * - * The first page is used for padding at this time so the - * buffer list does not begin at offset 0 of the PCI - * adapter's shared memory. - * - * The 2nd page is used for the buffer list. A 4K buffer - * list can hold 128 DMA_BUFFER structures at 32 bytes - * each. - * - * This leaves 62 4K pages. - * - * The next N pages are used for transmit frame(s). We - * reserve enough 4K page blocks to hold the required - * number of transmit dma buffers (num_tx_dma_buffers), - * each of MaxFrameSize size. - * - * Of the remaining pages (62-N), determine how many can - * be used to receive full MaxFrameSize inbound frames - */ - info->tx_buffer_count = info->num_tx_dma_buffers * BuffersPerFrame; - info->rx_buffer_count = 62 - info->tx_buffer_count; - } else { - /* Calculate the number of PAGE_SIZE buffers needed for */ - /* receive and transmit DMA buffers. */ - - - /* Calculate the number of DMA buffers necessary to */ - /* hold 7 max size receive frames and one max size transmit frame. */ - /* The receive buffer count is bumped by one so we avoid an */ - /* End of List condition if all receive buffers are used when */ - /* using linked list DMA buffers. */ - - info->tx_buffer_count = info->num_tx_dma_buffers * BuffersPerFrame; - info->rx_buffer_count = (BuffersPerFrame * MAXRXFRAMES) + 6; - - /* - * limit total TxBuffers & RxBuffers to 62 4K total - * (ala PCI Allocation) - */ - - if ( (info->tx_buffer_count + info->rx_buffer_count) > 62 ) - info->rx_buffer_count = 62 - info->tx_buffer_count; - - } + /* + * The PCI adapter has 256KBytes of shared memory to use. This is 64 + * PAGE_SIZE buffers. + * + * The first page is used for padding at this time so the buffer list + * does not begin at offset 0 of the PCI adapter's shared memory. + * + * The 2nd page is used for the buffer list. A 4K buffer list can hold + * 128 DMA_BUFFER structures at 32 bytes each. + * + * This leaves 62 4K pages. + * + * The next N pages are used for transmit frame(s). We reserve enough + * 4K page blocks to hold the required number of transmit dma buffers + * (num_tx_dma_buffers), each of MaxFrameSize size. + * + * Of the remaining pages (62-N), determine how many can be used to + * receive full MaxFrameSize inbound frames + */ + info->tx_buffer_count = info->num_tx_dma_buffers * BuffersPerFrame; + info->rx_buffer_count = 62 - info->tx_buffer_count; if ( debug_level >= DEBUG_LEVEL_INFO ) printk("%s(%d):Allocating %d TX and %d RX DMA buffers.\n", @@ -3652,23 +3618,10 @@ static int mgsl_alloc_buffer_list_memory( struct mgsl_struct *info ) { unsigned int i; - if ( info->bus_type == MGSL_BUS_TYPE_PCI ) { - /* PCI adapter uses shared memory. */ - info->buffer_list = info->memory_base + info->last_mem_alloc; - info->buffer_list_phys = info->last_mem_alloc; - info->last_mem_alloc += BUFFERLISTSIZE; - } else { - /* ISA adapter uses system memory. */ - /* The buffer lists are allocated as a common buffer that both */ - /* the processor and adapter can access. This allows the driver to */ - /* inspect portions of the buffer while other portions are being */ - /* updated by the adapter using Bus Master DMA. */ - - info->buffer_list = dma_alloc_coherent(NULL, BUFFERLISTSIZE, &info->buffer_list_dma_addr, GFP_KERNEL); - if (info->buffer_list == NULL) - return -ENOMEM; - info->buffer_list_phys = (u32)(info->buffer_list_dma_addr); - } + /* PCI adapter uses shared memory. */ + info->buffer_list = info->memory_base + info->last_mem_alloc; + info->buffer_list_phys = info->last_mem_alloc; + info->last_mem_alloc += BUFFERLISTSIZE; /* We got the memory for the buffer entry lists. */ /* Initialize the memory block to all zeros. */ @@ -3734,9 +3687,6 @@ static int mgsl_alloc_buffer_list_memory( struct mgsl_struct *info ) */ static void mgsl_free_buffer_list_memory( struct mgsl_struct *info ) { - if (info->buffer_list && info->bus_type != MGSL_BUS_TYPE_PCI) - dma_free_coherent(NULL, BUFFERLISTSIZE, info->buffer_list, info->buffer_list_dma_addr); - info->buffer_list = NULL; info->rx_buffer_list = NULL; info->tx_buffer_list = NULL; @@ -3762,24 +3712,13 @@ static void mgsl_free_buffer_list_memory( struct mgsl_struct *info ) static int mgsl_alloc_frame_memory(struct mgsl_struct *info,DMABUFFERENTRY *BufferList,int Buffercount) { int i; - u32 phys_addr; /* Allocate page sized buffers for the receive buffer list */ for ( i = 0; i < Buffercount; i++ ) { - if ( info->bus_type == MGSL_BUS_TYPE_PCI ) { - /* PCI adapter uses shared memory buffers. */ - BufferList[i].virt_addr = info->memory_base + info->last_mem_alloc; - phys_addr = info->last_mem_alloc; - info->last_mem_alloc += DMABUFFERSIZE; - } else { - /* ISA adapter uses system memory. */ - BufferList[i].virt_addr = dma_alloc_coherent(NULL, DMABUFFERSIZE, &BufferList[i].dma_addr, GFP_KERNEL); - if (BufferList[i].virt_addr == NULL) - return -ENOMEM; - phys_addr = (u32)(BufferList[i].dma_addr); - } - BufferList[i].phys_addr = phys_addr; + BufferList[i].virt_addr = info->memory_base + info->last_mem_alloc; + BufferList[i].phys_addr = info->last_mem_alloc; + info->last_mem_alloc += DMABUFFERSIZE; } return 0; @@ -3807,8 +3746,6 @@ static void mgsl_free_frame_memory(struct mgsl_struct *info, DMABUFFERENTRY *Buf if ( BufferList ) { for ( i = 0 ; i < Buffercount ; i++ ) { if ( BufferList[i].virt_addr ) { - if ( info->bus_type != MGSL_BUS_TYPE_PCI ) - dma_free_coherent(NULL, DMABUFFERSIZE, BufferList[i].virt_addr, BufferList[i].dma_addr); BufferList[i].virt_addr = NULL; } } @@ -4040,58 +3977,40 @@ static int mgsl_claim_resources(struct mgsl_struct *info) } info->irq_requested = true; - if ( info->bus_type == MGSL_BUS_TYPE_PCI ) { - if (request_mem_region(info->phys_memory_base,0x40000,"synclink") == NULL) { - printk( "%s(%d):mem addr conflict device %s Addr=%08X\n", - __FILE__,__LINE__,info->device_name, info->phys_memory_base); - goto errout; - } - info->shared_mem_requested = true; - if (request_mem_region(info->phys_lcr_base + info->lcr_offset,128,"synclink") == NULL) { - printk( "%s(%d):lcr mem addr conflict device %s Addr=%08X\n", - __FILE__,__LINE__,info->device_name, info->phys_lcr_base + info->lcr_offset); - goto errout; - } - info->lcr_mem_requested = true; - - info->memory_base = ioremap(info->phys_memory_base, - 0x40000); - if (!info->memory_base) { - printk( "%s(%d):Can't map shared memory on device %s MemAddr=%08X\n", - __FILE__,__LINE__,info->device_name, info->phys_memory_base ); - goto errout; - } - - if ( !mgsl_memory_test(info) ) { - printk( "%s(%d):Failed shared memory test %s MemAddr=%08X\n", - __FILE__,__LINE__,info->device_name, info->phys_memory_base ); - goto errout; - } - - info->lcr_base = ioremap(info->phys_lcr_base, - PAGE_SIZE); - if (!info->lcr_base) { - printk( "%s(%d):Can't map LCR memory on device %s MemAddr=%08X\n", - __FILE__,__LINE__,info->device_name, info->phys_lcr_base ); - goto errout; - } - info->lcr_base += info->lcr_offset; - - } else { - /* claim DMA channel */ - - if (request_dma(info->dma_level,info->device_name) < 0){ - printk( "%s(%d):Can't request DMA channel on device %s DMA=%d\n", - __FILE__,__LINE__,info->device_name, info->dma_level ); - goto errout; - } - info->dma_requested = true; - - /* ISA adapter uses bus master DMA */ - set_dma_mode(info->dma_level,DMA_MODE_CASCADE); - enable_dma(info->dma_level); + if (request_mem_region(info->phys_memory_base,0x40000,"synclink") == NULL) { + printk( "%s(%d):mem addr conflict device %s Addr=%08X\n", + __FILE__,__LINE__,info->device_name, info->phys_memory_base); + goto errout; } - + info->shared_mem_requested = true; + if (request_mem_region(info->phys_lcr_base + info->lcr_offset,128,"synclink") == NULL) { + printk( "%s(%d):lcr mem addr conflict device %s Addr=%08X\n", + __FILE__,__LINE__,info->device_name, info->phys_lcr_base + info->lcr_offset); + goto errout; + } + info->lcr_mem_requested = true; + + info->memory_base = ioremap(info->phys_memory_base, 0x40000); + if (!info->memory_base) { + printk( "%s(%d):Can't map shared memory on device %s MemAddr=%08X\n", + __FILE__,__LINE__,info->device_name, info->phys_memory_base ); + goto errout; + } + + if ( !mgsl_memory_test(info) ) { + printk( "%s(%d):Failed shared memory test %s MemAddr=%08X\n", + __FILE__,__LINE__,info->device_name, info->phys_memory_base ); + goto errout; + } + + info->lcr_base = ioremap(info->phys_lcr_base, PAGE_SIZE); + if (!info->lcr_base) { + printk( "%s(%d):Can't map LCR memory on device %s MemAddr=%08X\n", + __FILE__,__LINE__,info->device_name, info->phys_lcr_base ); + goto errout; + } + info->lcr_base += info->lcr_offset; + if ( mgsl_allocate_dma_buffers(info) < 0 ) { printk( "%s(%d):Can't allocate DMA buffers on device %s DMA=%d\n", __FILE__,__LINE__,info->device_name, info->dma_level ); @@ -4200,16 +4119,10 @@ static void mgsl_add_device( struct mgsl_struct *info ) else if ( info->max_frame_size > 65535 ) info->max_frame_size = 65535; - if ( info->bus_type == MGSL_BUS_TYPE_PCI ) { - printk( "SyncLink PCI v%d %s: IO=%04X IRQ=%d Mem=%08X,%08X MaxFrameSize=%u\n", - info->hw_version + 1, info->device_name, info->io_base, info->irq_level, - info->phys_memory_base, info->phys_lcr_base, - info->max_frame_size ); - } else { - printk( "SyncLink ISA %s: IO=%04X IRQ=%d DMA=%d MaxFrameSize=%u\n", - info->device_name, info->io_base, info->irq_level, info->dma_level, - info->max_frame_size ); - } + printk( "SyncLink PCI v%d %s: IO=%04X IRQ=%d Mem=%08X,%08X MaxFrameSize=%u\n", + info->hw_version + 1, info->device_name, info->io_base, info->irq_level, + info->phys_memory_base, info->phys_lcr_base, + info->max_frame_size ); #if SYNCLINK_GENERIC_HDLC hdlcdev_init(info); @@ -4420,8 +4333,7 @@ static void usc_RTCmd( struct mgsl_struct *info, u16 Cmd ) outw( Cmd + info->loopback_bits, info->io_base + CCAR ); /* Read to flush write to CCAR */ - if ( info->bus_type == MGSL_BUS_TYPE_PCI ) - inw( info->io_base + CCAR ); + inw( info->io_base + CCAR ); } /* end of usc_RTCmd() */ @@ -4445,8 +4357,7 @@ static void usc_DmaCmd( struct mgsl_struct *info, u16 Cmd ) outw( Cmd + info->mbre_bit, info->io_base ); /* Read to flush write to DCAR */ - if ( info->bus_type == MGSL_BUS_TYPE_PCI ) - inw( info->io_base ); + inw( info->io_base ); } /* end of usc_DmaCmd() */ @@ -4475,8 +4386,7 @@ static void usc_OutDmaReg( struct mgsl_struct *info, u16 RegAddr, u16 RegValue ) outw( RegValue, info->io_base ); /* Read to flush write to DCAR */ - if ( info->bus_type == MGSL_BUS_TYPE_PCI ) - inw( info->io_base ); + inw( info->io_base ); } /* end of usc_OutDmaReg() */ @@ -4528,8 +4438,7 @@ static void usc_OutReg( struct mgsl_struct *info, u16 RegAddr, u16 RegValue ) outw( RegValue, info->io_base + CCAR ); /* Read to flush write to CCAR */ - if ( info->bus_type == MGSL_BUS_TYPE_PCI ) - inw( info->io_base + CCAR ); + inw( info->io_base + CCAR ); } /* end of usc_OutReg() */ @@ -4728,10 +4637,7 @@ static void usc_set_sdlc_mode( struct mgsl_struct *info ) RegValue = usc_InReg( info, RICR ) & 0xc0; - if ( info->bus_type == MGSL_BUS_TYPE_PCI ) - usc_OutReg( info, RICR, (u16)(0x030a | RegValue) ); - else - usc_OutReg( info, RICR, (u16)(0x140a | RegValue) ); + usc_OutReg( info, RICR, (u16)(0x030a | RegValue) ); /* Unlatch all Rx status bits and clear Rx status IRQ Pending */ @@ -4792,10 +4698,7 @@ static void usc_set_sdlc_mode( struct mgsl_struct *info ) * 0000 0000 0011 0110 = 0x0036 */ - if ( info->bus_type == MGSL_BUS_TYPE_PCI ) - usc_OutReg( info, TICR, 0x0736 ); - else - usc_OutReg( info, TICR, 0x1436 ); + usc_OutReg( info, TICR, 0x0736 ); usc_UnlatchTxstatusBits( info, TXSTATUS_ALL ); usc_ClearIrqPendingBits( info, TRANSMIT_STATUS ); @@ -4885,10 +4788,7 @@ static void usc_set_sdlc_mode( struct mgsl_struct *info ) /* DPLL is enabled. Use BRG1 to provide continuous reference clock */ /* for DPLL. DPLL mode in HCR is dependent on the encoding used. */ - if ( info->bus_type == MGSL_BUS_TYPE_PCI ) - XtalSpeed = 11059200; - else - XtalSpeed = 14745600; + XtalSpeed = 11059200; if ( info->params.flags & HDLC_FLAG_DPLL_DIV16 ) { DpllDivisor = 16; @@ -5011,13 +4911,8 @@ static void usc_set_sdlc_mode( struct mgsl_struct *info ) * 0110 0000 0000 1011 = 0x600b */ - if ( info->bus_type == MGSL_BUS_TYPE_PCI ) { - /* PCI adapter does not need DMA wait state */ - usc_OutDmaReg( info, DCR, 0xa00b ); - } - else - usc_OutDmaReg( info, DCR, 0x800b ); - + /* PCI adapter does not need DMA wait state */ + usc_OutDmaReg( info, DCR, 0xa00b ); /* Receive DMA mode Register (RDMR) * @@ -5109,12 +5004,8 @@ static void usc_set_sdlc_mode( struct mgsl_struct *info ) * <7..0> 0x00 Maximum number of clock cycles per bus grant */ - if ( info->bus_type == MGSL_BUS_TYPE_PCI ) { - /* don't limit bus occupancy on PCI adapter */ - usc_OutDmaReg( info, BDCR, 0x0000 ); - } - else - usc_OutDmaReg( info, BDCR, 0x2000 ); + /* don't limit bus occupancy on PCI adapter */ + usc_OutDmaReg( info, BDCR, 0x0000 ); usc_stop_transmitter(info); usc_stop_receiver(info); @@ -5155,10 +5046,7 @@ static void usc_enable_loopback(struct mgsl_struct *info, int enable) /* Write 16-bit Time Constant for BRG0 */ /* use clock speed if available, otherwise use 8 for diagnostics */ if (info->params.clock_speed) { - if (info->bus_type == MGSL_BUS_TYPE_PCI) - usc_OutReg(info, TC0R, (u16)((11059200/info->params.clock_speed)-1)); - else - usc_OutReg(info, TC0R, (u16)((14745600/info->params.clock_speed)-1)); + usc_OutReg(info, TC0R, (u16)((11059200/info->params.clock_speed)-1)); } else usc_OutReg(info, TC0R, (u16)8); @@ -5201,10 +5089,7 @@ static void usc_enable_aux_clock( struct mgsl_struct *info, u32 data_rate ) u16 Tc; if ( data_rate ) { - if ( info->bus_type == MGSL_BUS_TYPE_PCI ) - XtalSpeed = 11059200; - else - XtalSpeed = 14745600; + XtalSpeed = 11059200; /* Tc = (Xtal/Speed) - 1 */ @@ -5682,44 +5567,38 @@ static void usc_load_txfifo( struct mgsl_struct *info ) */ static void usc_reset( struct mgsl_struct *info ) { - if ( info->bus_type == MGSL_BUS_TYPE_PCI ) { - int i; - u32 readval; + int i; + u32 readval; - /* Set BIT30 of Misc Control Register */ - /* (Local Control Register 0x50) to force reset of USC. */ + /* Set BIT30 of Misc Control Register */ + /* (Local Control Register 0x50) to force reset of USC. */ - volatile u32 *MiscCtrl = (u32 *)(info->lcr_base + 0x50); - u32 *LCR0BRDR = (u32 *)(info->lcr_base + 0x28); + volatile u32 *MiscCtrl = (u32 *)(info->lcr_base + 0x50); + u32 *LCR0BRDR = (u32 *)(info->lcr_base + 0x28); - info->misc_ctrl_value |= BIT30; - *MiscCtrl = info->misc_ctrl_value; + info->misc_ctrl_value |= BIT30; + *MiscCtrl = info->misc_ctrl_value; - /* - * Force at least 170ns delay before clearing - * reset bit. Each read from LCR takes at least - * 30ns so 10 times for 300ns to be safe. - */ - for(i=0;i<10;i++) - readval = *MiscCtrl; + /* + * Force at least 170ns delay before clearing reset bit. Each read from + * LCR takes at least 30ns so 10 times for 300ns to be safe. + */ + for(i=0;i<10;i++) + readval = *MiscCtrl; - info->misc_ctrl_value &= ~BIT30; - *MiscCtrl = info->misc_ctrl_value; + info->misc_ctrl_value &= ~BIT30; + *MiscCtrl = info->misc_ctrl_value; - *LCR0BRDR = BUS_DESCRIPTOR( - 1, // Write Strobe Hold (0-3) - 2, // Write Strobe Delay (0-3) - 2, // Read Strobe Delay (0-3) - 0, // NWDD (Write data-data) (0-3) - 4, // NWAD (Write Addr-data) (0-31) - 0, // NXDA (Read/Write Data-Addr) (0-3) - 0, // NRDD (Read Data-Data) (0-3) - 5 // NRAD (Read Addr-Data) (0-31) - ); - } else { - /* do HW reset */ - outb( 0,info->io_base + 8 ); - } + *LCR0BRDR = BUS_DESCRIPTOR( + 1, // Write Strobe Hold (0-3) + 2, // Write Strobe Delay (0-3) + 2, // Read Strobe Delay (0-3) + 0, // NWDD (Write data-data) (0-3) + 4, // NWAD (Write Addr-data) (0-31) + 0, // NXDA (Read/Write Data-Addr) (0-3) + 0, // NRDD (Read Data-Data) (0-3) + 5 // NRAD (Read Addr-Data) (0-31) + ); info->mbre_bit = 0; info->loopback_bits = 0; @@ -6228,11 +6107,7 @@ static void usc_enable_async_clock( struct mgsl_struct *info, u32 data_rate ) * ClkSpeed = 921600 (ISA), 691200 (PCI) */ - if ( info->bus_type == MGSL_BUS_TYPE_PCI ) - usc_OutReg( info, TC0R, (u16)((691200/data_rate) - 1) ); - else - usc_OutReg( info, TC0R, (u16)((921600/data_rate) - 1) ); - + usc_OutReg( info, TC0R, (u16)((691200/data_rate) - 1) ); /* * Hardware Configuration Register (HCR) @@ -6837,10 +6712,7 @@ static void mgsl_load_tx_dma_buffer(struct mgsl_struct *info, /* Actually copy data from source buffer to DMA buffer. */ /* Also set the data count for this individual DMA buffer. */ - if ( info->bus_type == MGSL_BUS_TYPE_PCI ) - mgsl_load_pci_memory(pBufEntry->virt_addr, Buffer,Copycount); - else - memcpy(pBufEntry->virt_addr, Buffer, Copycount); + mgsl_load_pci_memory(pBufEntry->virt_addr, Buffer,Copycount); pBufEntry->count = Copycount; @@ -7315,9 +7187,6 @@ static bool mgsl_memory_test( struct mgsl_struct *info ) unsigned long TestLimit = SHARED_MEM_ADDRESS_SIZE/sizeof(unsigned long); unsigned long * TestAddr; - if ( info->bus_type != MGSL_BUS_TYPE_PCI ) - return true; - TestAddr = (unsigned long *)info->memory_base; /* Test data lines with test pattern at one location. */ @@ -8003,7 +7872,6 @@ static int synclink_init_one (struct pci_dev *dev, info->lcr_offset = info->phys_lcr_base & (PAGE_SIZE-1); info->phys_lcr_base &= ~(PAGE_SIZE-1); - info->bus_type = MGSL_BUS_TYPE_PCI; info->io_addr_size = 8; info->irq_flags = IRQF_SHARED;