From 4ffdcf0469f1e7e47476ee410e8dfbc6aba61b65 Mon Sep 17 00:00:00 2001 From: Sonic Zhang Date: Wed, 8 Aug 2012 00:13:32 -0400 Subject: [PATCH] mmc: bfin_sdh: Add support for new RSI controller in bf60x In BF60x RSI controller: 1) MMR read/write width differs. 2) PWR and CTL MMRs are merged to together. 3) ROD and PD_DAT3 bit masks are obsolete. 4) New RSI block size MMR is defined. 5) The definition of DMA descriptor set size is changed. 6) set_ios should powers up controller in 2 steps. In addition, this patch cleans up the spin locks. Signed-off-by: Sonic Zhang Signed-off-by: Chris Ball --- drivers/mmc/host/bfin_sdh.c | 182 +++++++++++++++++++++++++----------- 1 file changed, 129 insertions(+), 53 deletions(-) diff --git a/drivers/mmc/host/bfin_sdh.c b/drivers/mmc/host/bfin_sdh.c index 56a10938b44a..f47526f09271 100644 --- a/drivers/mmc/host/bfin_sdh.c +++ b/drivers/mmc/host/bfin_sdh.c @@ -24,9 +24,7 @@ #include #include -#if defined(CONFIG_BF51x) -#define bfin_read_SDH_PWR_CTL bfin_read_RSI_PWR_CTL -#define bfin_write_SDH_PWR_CTL bfin_write_RSI_PWR_CTL +#if defined(CONFIG_BF51x) || defined(__ADSPBF60x__) #define bfin_read_SDH_CLK_CTL bfin_read_RSI_CLK_CTL #define bfin_write_SDH_CLK_CTL bfin_write_RSI_CLK_CTL #define bfin_write_SDH_ARGUMENT bfin_write_RSI_ARGUMENT @@ -45,8 +43,16 @@ #define bfin_write_SDH_E_STATUS bfin_write_RSI_E_STATUS #define bfin_read_SDH_STATUS bfin_read_RSI_STATUS #define bfin_write_SDH_MASK0 bfin_write_RSI_MASK0 +#define bfin_write_SDH_E_MASK bfin_write_RSI_E_MASK #define bfin_read_SDH_CFG bfin_read_RSI_CFG #define bfin_write_SDH_CFG bfin_write_RSI_CFG +# if defined(__ADSPBF60x__) +# define bfin_read_SDH_BLK_SIZE bfin_read_RSI_BLKSZ +# define bfin_write_SDH_BLK_SIZE bfin_write_RSI_BLKSZ +# else +# define bfin_read_SDH_PWR_CTL bfin_read_RSI_PWR_CTL +# define bfin_write_SDH_PWR_CTL bfin_write_RSI_PWR_CTL +# endif #endif struct sdh_host { @@ -62,6 +68,7 @@ struct sdh_host { dma_addr_t sg_dma; int dma_len; + unsigned long sclk; unsigned int imask; unsigned int power_mode; unsigned int clk_div; @@ -127,11 +134,15 @@ static int sdh_setup_data(struct sdh_host *host, struct mmc_data *data) /* Only supports power-of-2 block size */ if (data->blksz & (data->blksz - 1)) return -EINVAL; +#ifndef RSI_BLKSZ data_ctl |= ((ffs(data->blksz) - 1) << 4); +#else + bfin_write_SDH_BLK_SIZE(data->blksz); +#endif bfin_write_SDH_DATA_CTL(data_ctl); /* the time of a host clock period in ns */ - cycle_ns = 1000000000 / (get_sclk() / (2 * (host->clk_div + 1))); + cycle_ns = 1000000000 / (host->sclk / (2 * (host->clk_div + 1))); timeout = data->timeout_ns / cycle_ns; timeout += data->timeout_clks; bfin_write_SDH_DATA_TIMER(timeout); @@ -145,8 +156,13 @@ static int sdh_setup_data(struct sdh_host *host, struct mmc_data *data) sdh_enable_stat_irq(host, (DAT_CRC_FAIL | DAT_TIME_OUT | DAT_END)); host->dma_len = dma_map_sg(mmc_dev(host->mmc), data->sg, data->sg_len, host->dma_dir); -#if defined(CONFIG_BF54x) - dma_cfg |= DMAFLOW_ARRAY | NDSIZE_5 | RESTART | WDSIZE_32 | DMAEN; +#if defined(CONFIG_BF54x) || defined(CONFIG_BF60x) + dma_cfg |= DMAFLOW_ARRAY | RESTART | WDSIZE_32 | DMAEN; +# ifdef RSI_BLKSZ + dma_cfg |= PSIZE_32 | NDSIZE_3; +# else + dma_cfg |= NDSIZE_5; +# endif { struct scatterlist *sg; int i; @@ -156,7 +172,7 @@ static int sdh_setup_data(struct sdh_host *host, struct mmc_data *data) host->sg_cpu[i].x_count = sg_dma_len(sg) / 4; host->sg_cpu[i].x_modify = 4; dev_dbg(mmc_dev(host->mmc), "%d: start_addr:0x%lx, " - "cfg:0x%x, x_count:0x%x, x_modify:0x%x\n", + "cfg:0x%lx, x_count:0x%lx, x_modify:0x%lx\n", i, host->sg_cpu[i].start_addr, host->sg_cpu[i].cfg, host->sg_cpu[i].x_count, host->sg_cpu[i].x_modify); @@ -172,6 +188,7 @@ static int sdh_setup_data(struct sdh_host *host, struct mmc_data *data) set_dma_curr_desc_addr(host->dma_ch, (unsigned long *)host->sg_dma); set_dma_x_count(host->dma_ch, 0); set_dma_x_modify(host->dma_ch, 0); + SSYNC(); set_dma_config(host->dma_ch, dma_cfg); #elif defined(CONFIG_BF51x) /* RSI DMA doesn't work in array mode */ @@ -179,6 +196,7 @@ static int sdh_setup_data(struct sdh_host *host, struct mmc_data *data) set_dma_start_addr(host->dma_ch, sg_dma_address(&data->sg[0])); set_dma_x_count(host->dma_ch, length / 4); set_dma_x_modify(host->dma_ch, 4); + SSYNC(); set_dma_config(host->dma_ch, dma_cfg); #endif bfin_write_SDH_DATA_CTL(bfin_read_SDH_DATA_CTL() | DTX_DMA_E | DTX_E); @@ -296,7 +314,6 @@ static int sdh_data_done(struct sdh_host *host, unsigned int stat) else data->bytes_xfered = 0; - sdh_disable_stat_irq(host, DAT_END | DAT_TIME_OUT | DAT_CRC_FAIL | RX_OVERRUN | TX_UNDERRUN); bfin_write_SDH_STATUS_CLR(DAT_END_STAT | DAT_TIMEOUT_STAT | \ DAT_CRC_FAIL_STAT | DAT_BLK_END_STAT | RX_OVERRUN | TX_UNDERRUN); bfin_write_SDH_DATA_CTL(0); @@ -321,74 +338,115 @@ static void sdh_request(struct mmc_host *mmc, struct mmc_request *mrq) dev_dbg(mmc_dev(host->mmc), "%s enter, mrp:%p, cmd:%p\n", __func__, mrq, mrq->cmd); WARN_ON(host->mrq != NULL); + spin_lock(&host->lock); host->mrq = mrq; host->data = mrq->data; if (mrq->data && mrq->data->flags & MMC_DATA_READ) { ret = sdh_setup_data(host, mrq->data); if (ret) - return; + goto data_err; } sdh_start_cmd(host, mrq->cmd); +data_err: + spin_unlock(&host->lock); } static void sdh_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) { struct sdh_host *host; - unsigned long flags; u16 clk_ctl = 0; +#ifndef RSI_BLKSZ u16 pwr_ctl = 0; +#endif u16 cfg; host = mmc_priv(mmc); - spin_lock_irqsave(&host->lock, flags); - if (ios->clock) { - unsigned long sys_clk, ios_clk; + spin_lock(&host->lock); + + cfg = bfin_read_SDH_CFG(); + cfg |= MWE; + switch (ios->bus_width) { + case MMC_BUS_WIDTH_4: +#ifndef RSI_BLKSZ + cfg &= ~PD_SDDAT3; +#endif + cfg |= PUP_SDDAT3; + /* Enable 4 bit SDIO */ + cfg |= SD4E; + clk_ctl |= WIDE_BUS_4; + break; + case MMC_BUS_WIDTH_8: +#ifndef RSI_BLKSZ + cfg &= ~PD_SDDAT3; +#endif + cfg |= PUP_SDDAT3; + /* Disable 4 bit SDIO */ + cfg &= ~SD4E; + clk_ctl |= BYTE_BUS_8; + break; + default: + cfg &= ~PUP_SDDAT3; + /* Disable 4 bit SDIO */ + cfg &= ~SD4E; + } + + host->power_mode = ios->power_mode; +#ifndef RSI_BLKSZ + if (ios->bus_mode == MMC_BUSMODE_OPENDRAIN) { + pwr_ctl |= ROD_CTL; +# ifndef CONFIG_SDH_BFIN_MISSING_CMD_PULLUP_WORKAROUND + pwr_ctl |= SD_CMD_OD; +# endif + } + + if (ios->power_mode != MMC_POWER_OFF) + pwr_ctl |= PWR_ON; + else + pwr_ctl &= ~PWR_ON; + + bfin_write_SDH_PWR_CTL(pwr_ctl); +#else +# ifndef CONFIG_SDH_BFIN_MISSING_CMD_PULLUP_WORKAROUND + if (ios->bus_mode == MMC_BUSMODE_OPENDRAIN) + cfg |= SD_CMD_OD; + else + cfg &= ~SD_CMD_OD; +# endif + + + if (ios->power_mode != MMC_POWER_OFF) + cfg |= PWR_ON; + else + cfg &= ~PWR_ON; + + bfin_write_SDH_CFG(cfg); +#endif + SSYNC(); + + if (ios->power_mode == MMC_POWER_ON && ios->clock) { unsigned char clk_div; - ios_clk = 2 * ios->clock; - sys_clk = get_sclk(); - clk_div = sys_clk / ios_clk; - if (sys_clk % ios_clk == 0) - clk_div -= 1; + clk_div = (get_sclk() / ios->clock - 1) / 2; clk_div = min_t(unsigned char, clk_div, 0xFF); clk_ctl |= clk_div; clk_ctl |= CLK_E; host->clk_div = clk_div; + bfin_write_SDH_CLK_CTL(clk_ctl); + } else sdh_stop_clock(host); - if (ios->bus_mode == MMC_BUSMODE_OPENDRAIN) -#ifdef CONFIG_SDH_BFIN_MISSING_CMD_PULLUP_WORKAROUND - pwr_ctl |= ROD_CTL; -#else - pwr_ctl |= SD_CMD_OD | ROD_CTL; -#endif - - if (ios->bus_width == MMC_BUS_WIDTH_4) { - cfg = bfin_read_SDH_CFG(); - cfg &= ~PD_SDDAT3; - cfg |= PUP_SDDAT3; - /* Enable 4 bit SDIO */ - cfg |= (SD4E | MWE); - bfin_write_SDH_CFG(cfg); - clk_ctl |= WIDE_BUS; - } else { - cfg = bfin_read_SDH_CFG(); - cfg |= MWE; - bfin_write_SDH_CFG(cfg); - } - - bfin_write_SDH_CLK_CTL(clk_ctl); - - host->power_mode = ios->power_mode; + /* set up sdh interrupt mask*/ if (ios->power_mode == MMC_POWER_ON) - pwr_ctl |= PWR_ON; - - bfin_write_SDH_PWR_CTL(pwr_ctl); + bfin_write_SDH_MASK0(DAT_END | DAT_TIME_OUT | DAT_CRC_FAIL | + RX_OVERRUN | TX_UNDERRUN | CMD_SENT | CMD_RESP_END | + CMD_TIME_OUT | CMD_CRC_FAIL); + else + bfin_write_SDH_MASK0(0); SSYNC(); - spin_unlock_irqrestore(&host->lock, flags); + spin_unlock(&host->lock); dev_dbg(mmc_dev(host->mmc), "SDH: clk_div = 0x%x actual clock:%ld expected clock:%d\n", host->clk_div, @@ -405,7 +463,7 @@ static irqreturn_t sdh_dma_irq(int irq, void *devid) { struct sdh_host *host = devid; - dev_dbg(mmc_dev(host->mmc), "%s enter, irq_stat: 0x%04x\n", __func__, + dev_dbg(mmc_dev(host->mmc), "%s enter, irq_stat: 0x%04lx\n", __func__, get_dma_curr_irqstat(host->dma_ch)); clear_dma_irqstat(host->dma_ch); SSYNC(); @@ -420,6 +478,9 @@ static irqreturn_t sdh_stat_irq(int irq, void *devid) int handled = 0; dev_dbg(mmc_dev(host->mmc), "%s enter\n", __func__); + + spin_lock(&host->lock); + status = bfin_read_SDH_E_STATUS(); if (status & SD_CARD_DET) { mmc_detect_change(host->mmc, 0); @@ -437,6 +498,8 @@ static irqreturn_t sdh_stat_irq(int irq, void *devid) if (status & (DAT_END | DAT_TIME_OUT | DAT_CRC_FAIL | RX_OVERRUN | TX_UNDERRUN)) handled |= sdh_data_done(host, status); + spin_unlock(&host->lock); + dev_dbg(mmc_dev(host->mmc), "%s exit\n\n", __func__); return IRQ_RETVAL(handled); @@ -462,12 +525,16 @@ static int __devinit sdh_probe(struct platform_device *pdev) } mmc->ops = &sdh_ops; -#if defined(CONFIG_BF54x) - mmc->max_segs = 32; -#elif defined(CONFIG_BF51x) +#if defined(CONFIG_BF51x) mmc->max_segs = 1; +#else + mmc->max_segs = PAGE_SIZE / sizeof(struct dma_desc_array); #endif +#ifdef RSI_BLKSZ + mmc->max_seg_size = -1; +#else mmc->max_seg_size = 1 << 16; +#endif mmc->max_blk_size = 1 << 11; mmc->max_blk_count = 1 << 11; mmc->max_req_size = PAGE_SIZE; @@ -477,6 +544,7 @@ static int __devinit sdh_probe(struct platform_device *pdev) mmc->caps = MMC_CAP_4_BIT_DATA | MMC_CAP_NEEDS_POLL; host = mmc_priv(mmc); host->mmc = mmc; + host->sclk = get_sclk(); spin_lock_init(&host->lock); host->irq = drv_data->irq_int0; @@ -501,7 +569,6 @@ static int __devinit sdh_probe(struct platform_device *pdev) } platform_set_drvdata(pdev, mmc); - mmc_add_host(mmc); ret = request_irq(host->irq, sdh_stat_irq, 0, "SDH Status IRQ", host); if (ret) { @@ -522,12 +589,13 @@ static int __devinit sdh_probe(struct platform_device *pdev) bfin_write_SDH_CFG(bfin_read_SDH_CFG() | CLKS_EN); SSYNC(); - /* Disable card inserting detection pin. set MMC_CAP_NEES_POLL, and + /* Disable card inserting detection pin. set MMC_CAP_NEEDS_POLL, and * mmc stack will do the detection. */ bfin_write_SDH_CFG((bfin_read_SDH_CFG() & 0x1F) | (PUP_SDDAT | PUP_SDDAT3)); SSYNC(); + mmc_add_host(mmc); return 0; out4: @@ -575,7 +643,11 @@ static int sdh_suspend(struct platform_device *dev, pm_message_t state) if (mmc) ret = mmc_suspend_host(mmc); +#ifndef RSI_BLKSZ bfin_write_SDH_PWR_CTL(bfin_read_SDH_PWR_CTL() & ~PWR_ON); +#else + bfin_write_SDH_CFG(bfin_read_SDH_CFG() & ~PWR_ON); +#endif peripheral_free_list(drv_data->pin_req); return ret; @@ -593,12 +665,16 @@ static int sdh_resume(struct platform_device *dev) return ret; } - bfin_write_SDH_PWR_CTL(bfin_read_SDH_PWR_CTL() | PWR_ON); #if defined(CONFIG_BF54x) /* Secure Digital Host shares DMA with Nand controller */ bfin_write_DMAC1_PERIMUX(bfin_read_DMAC1_PERIMUX() | 0x1); #endif +#ifndef RSI_BLKSZ + bfin_write_SDH_PWR_CTL(bfin_read_SDH_PWR_CTL() | PWR_ON); bfin_write_SDH_CFG(bfin_read_SDH_CFG() | CLKS_EN); +#else + bfin_write_SDH_CFG(bfin_read_SDH_CFG() | CLKS_EN | PWR_ON); +#endif SSYNC(); bfin_write_SDH_CFG((bfin_read_SDH_CFG() & 0x1F) | (PUP_SDDAT | PUP_SDDAT3));