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mod old sdmmc drivers

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This commit is contained in:
kfx
2011-10-24 16:58:26 +08:00
parent 3dd097b336
commit 8b208bce97
1 changed files with 28 additions and 10 deletions
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38
drivers/mmc/host/rk29_sdmmc_old.c
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@@ -54,8 +54,8 @@
#define RK29_SDMMC_TMO_COUNT 10000
#define RK29_SDCARD_CLK 48 //48Mhz
#define RK29_SDIO_CLK 36 //36Mhz
#define RK29_SDCARD_CLK 50 //48Mhz
#define RK29_SDIO_CLK 50 //36Mhz
enum {
EVENT_CMD_COMPLETE = 0,
@@ -533,20 +533,40 @@ static int sdmmc_send_cmd(struct rk29_sdmmc *host, unsigned int cmd, int arg)
else
return -1;
}
static int rk29_sdmmc_get_div(unsigned int bus_hz, unsigned int ios_clock)
{
unsigned int div, real_clock;
if(ios_clock >= bus_hz)
return 0;
for(div = 1; div < 255; div++)
{
real_clock = bus_hz/(2*div);
if(real_clock <= ios_clock)
break;
}
if(div > 255)
div = 255;
return div;
}
int rk29_sdmmc_set_clock(struct rk29_sdmmc *host)
{
unsigned int div;
if(!host->ios_clock)
return 0;
div = (((host->bus_hz + (host->bus_hz / 5)) / host->ios_clock)) >> 1;
//div = (((host->bus_hz + (host->bus_hz / 5)) / host->ios_clock)) >> 1;
//if(host->mrq && host->mrq->cmd->opcode == 25)
//host->ios_clock = 500000;
div = rk29_sdmmc_get_div(host->bus_hz, host->ios_clock);
/*
if(div == 0)
div = 1;
*/
if(host->div == div)
return 0;
dev_info(host->dev, "div = %u, bus_hz = %u, ios_clock = %u\n",
div, host->bus_hz, host->ios_clock);
rk29_sdmmc_write(host->regs, SDMMC_CLKENA, 0);
rk29_sdmmc_write(host->regs, SDMMC_CLKSRC,0);
if(sdmmc_send_cmd(host, SDMMC_CMD_UPD_CLK | SDMMC_CMD_PRV_DAT_WAIT, 0))
@@ -834,7 +854,6 @@ static void rk29_sdmmc_request(struct mmc_host *mmc, struct mmc_request *mrq)
rk29_sdmmc_show_info(host);
return;
}
if(rk29_sdmmc_start_request(host,mrq)) {
dev_info(host->dev, "rk29_sdmmc_start_request timeout\n");
mrq->cmd->error = -EINPROGRESS;
@@ -1307,7 +1326,7 @@ static int rk29_sdmmc_probe(struct platform_device *pdev)
goto err_mmc_free_host;
}
host->regs = ioremap(regs->start, regs->end - regs->start + 1);
host->regs = ioremap(regs->start, regs->end - regs->start);
if (!host->regs){
dev_err(&pdev->dev, "ioremap error\n");
ret = ENXIO;
@@ -1378,9 +1397,8 @@ static int rk29_sdmmc_probe(struct platform_device *pdev)
mmc->ops = &rk29_sdmmc_ops[1];
else
mmc->ops = &rk29_sdmmc_ops[0];
if (host->is_sdio)
mmc->pm_flags = MMC_PM_IGNORE_PM_NOTIFY; //ignore pm notify
if (host->is_sdio)
mmc->pm_flags = MMC_PM_IGNORE_PM_NOTIFY; //ignore pm notify
mmc->f_min = DIV_ROUND_UP(host->bus_hz, 510);
mmc->f_max = host->bus_hz;
@@ -1388,7 +1406,7 @@ static int rk29_sdmmc_probe(struct platform_device *pdev)
mmc->caps = pdata->host_caps;
mmc->max_phys_segs = 64;
mmc->max_hw_segs = 64;
mmc->max_blk_size = 4095;
mmc->max_blk_size = 4096;
mmc->max_blk_count = 65535;
mmc->max_req_size = mmc->max_blk_size * mmc->max_blk_count;
mmc->max_seg_size = mmc->max_req_size;