diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/mmc/arm_pl180_mmci.c | 131 | ||||
| -rw-r--r-- | drivers/mmc/arm_pl180_mmci.h | 27 |
2 files changed, 75 insertions, 83 deletions
diff --git a/drivers/mmc/arm_pl180_mmci.c b/drivers/mmc/arm_pl180_mmci.c index 09d443e..db2c7ab 100644 --- a/drivers/mmc/arm_pl180_mmci.c +++ b/drivers/mmc/arm_pl180_mmci.c @@ -32,14 +32,10 @@ #include "arm_pl180_mmci.h" #include <malloc.h> -struct mmc_host { - struct sdi_registers *base; -}; - static int wait_for_command_end(struct mmc *dev, struct mmc_cmd *cmd) { u32 hoststatus, statusmask; - struct mmc_host *host = dev->priv; + struct pl180_mmc_host *host = dev->priv; statusmask = SDI_STA_CTIMEOUT | SDI_STA_CCRCFAIL; if ((cmd->resp_type & MMC_RSP_PRESENT)) @@ -53,8 +49,8 @@ static int wait_for_command_end(struct mmc *dev, struct mmc_cmd *cmd) writel(statusmask, &host->base->status_clear); if (hoststatus & SDI_STA_CTIMEOUT) { - printf("CMD%d time out\n", cmd->cmdidx); - return -ETIMEDOUT; + debug("CMD%d time out\n", cmd->cmdidx); + return TIMEOUT; } else if ((hoststatus & SDI_STA_CCRCFAIL) && (cmd->flags & MMC_RSP_CRC)) { printf("CMD%d CRC error\n", cmd->cmdidx); @@ -80,7 +76,7 @@ static int do_command(struct mmc *dev, struct mmc_cmd *cmd) { int result; u32 sdi_cmd = 0; - struct mmc_host *host = dev->priv; + struct pl180_mmc_host *host = dev->priv; sdi_cmd = ((cmd->cmdidx & SDI_CMD_CMDINDEX_MASK) | SDI_CMD_CPSMEN); @@ -112,7 +108,7 @@ static int read_bytes(struct mmc *dev, u32 *dest, u32 blkcount, u32 blksize) { u32 *tempbuff = dest; u64 xfercount = blkcount * blksize; - struct mmc_host *host = dev->priv; + struct pl180_mmc_host *host = dev->priv; u32 status, status_err; debug("read_bytes: blkcount=%u blksize=%u\n", blkcount, blksize); @@ -168,7 +164,7 @@ static int write_bytes(struct mmc *dev, u32 *src, u32 blkcount, u32 blksize) u32 *tempbuff = src; int i; u64 xfercount = blkcount * blksize; - struct mmc_host *host = dev->priv; + struct pl180_mmc_host *host = dev->priv; u32 status, status_err; debug("write_bytes: blkcount=%u blksize=%u\n", blkcount, blksize); @@ -227,14 +223,19 @@ static int do_data_transfer(struct mmc *dev, struct mmc_data *data) { int error = -ETIMEDOUT; - struct mmc_host *host = dev->priv; + struct pl180_mmc_host *host = dev->priv; u32 blksz = 0; u32 data_ctrl = 0; u32 data_len = (u32) (data->blocks * data->blocksize); - blksz = (ffs(data->blocksize) - 1); - data_ctrl |= ((blksz << 4) & SDI_DCTRL_DBLKSIZE_MASK); - data_ctrl |= SDI_DCTRL_DTEN; + if (!host->version2) { + blksz = (ffs(data->blocksize) - 1); + data_ctrl |= ((blksz << 4) & SDI_DCTRL_DBLKSIZE_MASK); + } else { + blksz = data->blocksize; + data_ctrl |= (blksz << SDI_DCTRL_DBLOCKSIZE_V2_SHIFT); + } + data_ctrl |= SDI_DCTRL_DTEN | SDI_DCTRL_BUSYMODE; writel(SDI_DTIMER_DEFAULT, &host->base->datatimer); writel(data_len, &host->base->datalength); @@ -257,7 +258,7 @@ static int do_data_transfer(struct mmc *dev, writel(data_ctrl, &host->base->datactrl); error = write_bytes(dev, (u32 *)data->src, (u32)data->blocks, - (u32)data->blocksize); + (u32)data->blocksize); } return error; @@ -280,17 +281,16 @@ static int host_request(struct mmc *dev, /* MMC uses open drain drivers in the enumeration phase */ static int mmc_host_reset(struct mmc *dev) { - struct mmc_host *host = dev->priv; - u32 sdi_u32 = SDI_PWR_OPD | SDI_PWR_PWRCTRL_ON; + struct pl180_mmc_host *host = dev->priv; - writel(sdi_u32, &host->base->power); + writel(host->pwr_init, &host->base->power); return 0; } static void host_set_ios(struct mmc *dev) { - struct mmc_host *host = dev->priv; + struct pl180_mmc_host *host = dev->priv; u32 sdi_clkcr; sdi_clkcr = readl(&host->base->clock); @@ -298,15 +298,26 @@ static void host_set_ios(struct mmc *dev) /* Ramp up the clock rate */ if (dev->clock) { u32 clkdiv = 0; + u32 tmp_clock; - if (dev->clock >= dev->f_max) + if (dev->clock >= dev->f_max) { + clkdiv = 0; dev->clock = dev->f_max; + } else { + clkdiv = (host->clock_in / dev->clock) - 2; + } - clkdiv = ((ARM_MCLK / dev->clock) / 2) - 1; + tmp_clock = host->clock_in / (clkdiv + 2); + while (tmp_clock > dev->clock) { + clkdiv++; + tmp_clock = host->clock_in / (clkdiv + 2); + } if (clkdiv > SDI_CLKCR_CLKDIV_MASK) clkdiv = SDI_CLKCR_CLKDIV_MASK; + tmp_clock = host->clock_in / (clkdiv + 2); + dev->clock = tmp_clock; sdi_clkcr &= ~(SDI_CLKCR_CLKDIV_MASK); sdi_clkcr |= clkdiv; } @@ -322,8 +333,11 @@ static void host_set_ios(struct mmc *dev) case 4: buswidth |= SDI_CLKCR_WIDBUS_4; break; + case 8: + buswidth |= SDI_CLKCR_WIDBUS_8; + break; default: - printf("Invalid bus width\n"); + printf("Invalid bus width: %d\n", dev->bus_width); break; } sdi_clkcr &= ~(SDI_CLKCR_WIDBUS_MASK); @@ -334,83 +348,40 @@ static void host_set_ios(struct mmc *dev) udelay(CLK_CHANGE_DELAY); } -struct mmc *alloc_mmc_struct(void) -{ - struct mmc_host *host = NULL; - struct mmc *mmc_device = NULL; - - host = malloc(sizeof(struct mmc_host)); - if (!host) - return NULL; - - mmc_device = malloc(sizeof(struct mmc)); - if (!mmc_device) - goto err; - - mmc_device->priv = host; - return mmc_device; - -err: - free(host); - return NULL; -} - /* * mmc_host_init - initialize the mmc controller. * Set initial clock and power for mmc slot. * Initialize mmc struct and register with mmc framework. */ -static int arm_pl180_mmci_host_init(struct mmc *dev) +int arm_pl180_mmci_init(struct pl180_mmc_host *host) { - struct mmc_host *host = dev->priv; + struct mmc *dev; u32 sdi_u32; - host->base = (struct sdi_registers *)CONFIG_ARM_PL180_MMCI_BASE; + dev = malloc(sizeof(struct mmc)); + if (!dev) + return -ENOMEM; - /* Initially set power-on, full voltage & MMCI read */ - sdi_u32 = INIT_PWR; - writel(sdi_u32, &host->base->power); + memset(dev, 0, sizeof(struct mmc)); + dev->priv = host; - /* setting clk freq 505KHz */ - sdi_u32 = SDI_CLKCR_CLKDIV_INIT | SDI_CLKCR_CLKEN; - writel(sdi_u32, &host->base->clock); + writel(host->pwr_init, &host->base->power); + writel(host->clkdiv_init, &host->base->clock); udelay(CLK_CHANGE_DELAY); /* Disable mmc interrupts */ sdi_u32 = readl(&host->base->mask0) & ~SDI_MASK0_MASK; writel(sdi_u32, &host->base->mask0); - - sprintf(dev->name, "MMC"); - dev->clock = ARM_MCLK / (2 * (SDI_CLKCR_CLKDIV_INIT + 1)); + strncpy(dev->name, host->name, sizeof(dev->name)); dev->send_cmd = host_request; dev->set_ios = host_set_ios; dev->init = mmc_host_reset; dev->getcd = NULL; - dev->host_caps = 0; - dev->voltages = VOLTAGE_WINDOW_MMC; - dev->f_min = dev->clock; - dev->f_max = CONFIG_ARM_PL180_MMCI_CLOCK_FREQ; - - return 0; -} - -int arm_pl180_mmci_init(void) -{ - int error; - struct mmc *dev; - - dev = alloc_mmc_struct(); - if (!dev) - return -1; - - error = arm_pl180_mmci_host_init(dev); - if (error) { - printf("mmci_host_init error - %d\n", error); - return -1; - } - - dev->b_max = 0; - + dev->host_caps = host->caps; + dev->voltages = host->voltages; + dev->f_min = host->clock_min; + dev->f_max = host->clock_max; + dev->b_max = host->b_max; mmc_register(dev); debug("registered mmc interface number is:%d\n", dev->block_dev.dev); diff --git a/drivers/mmc/arm_pl180_mmci.h b/drivers/mmc/arm_pl180_mmci.h index 42fbe3e..06709ed 100644 --- a/drivers/mmc/arm_pl180_mmci.h +++ b/drivers/mmc/arm_pl180_mmci.h @@ -26,8 +26,6 @@ #ifndef __ARM_PL180_MMCI_H__ #define __ARM_PL180_MMCI_H__ -int arm_pl180_mmci_init(void); - #define COMMAND_REG_DELAY 300 #define DATA_REG_DELAY 1000 #define CLK_CHANGE_DELAY 2000 @@ -59,8 +57,13 @@ int arm_pl180_mmci_init(void); #define SDI_CLKCR_WIDBUS_MASK 0x00001800 #define SDI_CLKCR_WIDBUS_1 0x00000000 #define SDI_CLKCR_WIDBUS_4 0x00000800 +/* V2 only */ +#define SDI_CLKCR_WIDBUS_8 0x00001000 +#define SDI_CLKCR_NEDGE 0x00002000 +#define SDI_CLKCR_HWFC_EN 0x00004000 -#define SDI_CLKCR_CLKDIV_INIT 0x000000C6 /* MCLK/(2*(0xC6+1)) => 505KHz */ +#define SDI_CLKCR_CLKDIV_INIT_V1 0x000000C6 /* MCLK/(2*(0xC6+1)) => 505KHz */ +#define SDI_CLKCR_CLKDIV_INIT_V2 0x000000FD /* SDI command register bits */ #define SDI_CMD_CMDINDEX_MASK 0x000000FF @@ -144,6 +147,8 @@ int arm_pl180_mmci_init(void); #define SDI_DCTRL_DBOOTMODEEN 0x00002000 #define SDI_DCTRL_BUSYMODE 0x00004000 #define SDI_DCTRL_DDR_MODE 0x00008000 +#define SDI_DCTRL_DBLOCKSIZE_V2_MASK 0x7fff0000 +#define SDI_DCTRL_DBLOCKSIZE_V2_SHIFT 16 #define SDI_FIFO_BURST_SIZE 8 @@ -180,4 +185,20 @@ struct sdi_registers { u32 pcell_id3; /* 0xFFC*/ }; +struct pl180_mmc_host { + struct sdi_registers *base; + char name[32]; + unsigned int b_max; + unsigned int voltages; + unsigned int caps; + unsigned int clock_in; + unsigned int clock_min; + unsigned int clock_max; + unsigned int clkdiv_init; + unsigned int pwr_init; + int version2; +}; + +int arm_pl180_mmci_init(struct pl180_mmc_host *); + #endif |