Re: [PATCH v3 2/4] ARM: pxa168: Add SDHCI support

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Hi Eric and Jason,

On Thu, Dec 01 2011, Chris Ball wrote:
> Hi Eric, Jason,
>
> Please could you ACK this patch if you agree with it, and I'll take it
> and the rest of the series via the MMC tree?  Thanks.

Ping?

Thanks,

- Chris.

> On Sun, Nov 20 2011, Tanmay Upadhyay wrote:
>> v2 - clock register for SDHCI are not common across all MMP SoCs.
>>      So, move PXA168 implementation to pxa168.c
>>
>> v3 - sdhci-pxav1 driver code is merged with sdhci-pxav2. So, change
>>      the device name accordingly
>>    - start sdhci device numbering from 1 as other PXA168 devices
>>      does that
>>
>> Signed-off-by: Tanmay Upadhyay <tanmay.upadhyay@xxxxxxxxxxxxxx>
>> Reviewed-by: Philip Rakity <prakity@xxxxxxxxxxx>
>> ---
>>  arch/arm/mach-mmp/include/mach/pxa168.h |   20 +++++++++++++
>>  arch/arm/mach-mmp/pxa168.c              |   46 +++++++++++++++++++++++++++++++
>>  2 files changed, 66 insertions(+), 0 deletions(-)
>>
>> diff --git a/arch/arm/mach-mmp/include/mach/pxa168.h b/arch/arm/mach-mmp/include/mach/pxa168.h
>> index 7fb568d..a181608 100644
>> --- a/arch/arm/mach-mmp/include/mach/pxa168.h
>> +++ b/arch/arm/mach-mmp/include/mach/pxa168.h
>> @@ -15,6 +15,7 @@ extern void pxa168_clear_keypad_wakeup(void);
>>  #include <plat/pxa27x_keypad.h>
>>  #include <mach/cputype.h>
>>  #include <linux/pxa168_eth.h>
>> +#include <linux/platform_data/pxa_sdhci.h>
>>  
>>  extern struct pxa_device_desc pxa168_device_uart1;
>>  extern struct pxa_device_desc pxa168_device_uart2;
>> @@ -34,6 +35,10 @@ extern struct pxa_device_desc pxa168_device_nand;
>>  extern struct pxa_device_desc pxa168_device_fb;
>>  extern struct pxa_device_desc pxa168_device_keypad;
>>  extern struct pxa_device_desc pxa168_device_eth;
>> +extern struct pxa_device_desc pxa168_device_sdh1;
>> +extern struct pxa_device_desc pxa168_device_sdh2;
>> +extern struct pxa_device_desc pxa168_device_sdh3;
>> +extern struct pxa_device_desc pxa168_device_sdh4;
>>  
>>  struct pxa168_usb_pdata {
>>  	/* If NULL, default phy init routine for PXA168 would be called */
>> @@ -132,4 +137,19 @@ static inline int pxa168_add_eth(struct pxa168_eth_platform_data *data)
>>  {
>>  	return pxa_register_device(&pxa168_device_eth, data, sizeof(*data));
>>  }
>> +
>> +static inline int pxa168_add_sdh(int id, struct sdhci_pxa_platdata *data)
>> +{
>> +	struct pxa_device_desc *d = NULL;
>> +
>> +	switch (id) {
>> +	case 1: d = &pxa168_device_sdh1; break;
>> +	case 2: d = &pxa168_device_sdh2; break;
>> +	case 3: d = &pxa168_device_sdh3; break;
>> +	case 4: d = &pxa168_device_sdh4; break;
>> +	default:
>> +		return -EINVAL;
>> +	}
>> +	return pxa_register_device(d, data, sizeof(*data));
>> +}
>>  #endif /* __ASM_MACH_PXA168_H */
>> diff --git a/arch/arm/mach-mmp/pxa168.c b/arch/arm/mach-mmp/pxa168.c
>> index 76ca15c..102f65f 100644
>> --- a/arch/arm/mach-mmp/pxa168.c
>> +++ b/arch/arm/mach-mmp/pxa168.c
>> @@ -45,6 +45,14 @@ static struct mfp_addr_map pxa168_mfp_addr_map[] __initdata =
>>  
>>  #define APMASK(i)	(GPIO_REGS_VIRT + BANK_OFF(i) + 0x09c)
>>  
>> +/* Offset defined in arch/arm/mach-mmp/include/mach/regs-apmu.h are for MMP2
>> + * PXA168 has different offset */
>> +#undef APMU_SDH2
>> +#undef APMU_SDH3
>> +
>> +#define APMU_SDH2	APMU_REG(0xe0)
>> +#define APMU_SDH3	APMU_REG(0xe4)
>> +
>>  static void __init pxa168_init_gpio(void)
>>  {
>>  	int i;
>> @@ -65,6 +73,31 @@ void __init pxa168_init_irq(void)
>>  	pxa168_init_gpio();
>>  }
>>  
>> +static void sdh_clk_enable(struct clk *clk)
>> +{
>> +	void __iomem *clk_reg_offset = clk->clk_rst;
>> +
>> +	/* Can't see any clean way to do this: Bits 3 & 0 in registers
>> +	 * for host 0 & 2 should be set for host 1 & 3 also */
>> +	if (clk_reg_offset == APMU_SDH0 || clk_reg_offset == APMU_SDH1)
>> +		__raw_writel(__raw_readl(APMU_SDH0) | 0x9, APMU_SDH0);
>> +	if (clk_reg_offset == APMU_SDH2 || clk_reg_offset == APMU_SDH3)
>> +		__raw_writel(__raw_readl(APMU_SDH2) | 0x9, APMU_SDH2);
>> +
>> +	__raw_writel(__raw_readl(clk->clk_rst) | clk->enable_val, clk->clk_rst);
>> +}
>> +
>> +static void sdh_clk_disable(struct clk *clk)
>> +{
>> +	__raw_writel(__raw_readl(clk->clk_rst) & ~(clk->enable_val),
>> +			clk->clk_rst);
>> +}
>> +
>> +struct clkops sdh_clk_ops = {
>> +	.enable		= sdh_clk_enable,
>> +	.disable	= sdh_clk_disable,
>> +};
>> +
>>  /* APB peripheral clocks */
>>  static APBC_CLK(uart1, PXA168_UART1, 1, 14745600);
>>  static APBC_CLK(uart2, PXA168_UART2, 1, 14745600);
>> @@ -87,6 +120,11 @@ static APMU_CLK(lcd, LCD, 0x7f, 312000000);
>>  static APMU_CLK(eth, ETH, 0x09, 0);
>>  static APMU_CLK(usb, USB, 0x12, 0);
>>  
>> +static APMU_CLK_OPS(sdh1, SDH0, 0x12, 48000000, &sdh_clk_ops);
>> +static APMU_CLK_OPS(sdh2, SDH1, 0x12, 48000000, &sdh_clk_ops);
>> +static APMU_CLK_OPS(sdh3, SDH2, 0x12, 48000000, &sdh_clk_ops);
>> +static APMU_CLK_OPS(sdh4, SDH3, 0x12, 48000000, &sdh_clk_ops);
>> +
>>  /* device and clock bindings */
>>  static struct clk_lookup pxa168_clkregs[] = {
>>  	INIT_CLKREG(&clk_uart1, "pxa2xx-uart.0", NULL),
>> @@ -108,6 +146,10 @@ static struct clk_lookup pxa168_clkregs[] = {
>>  	INIT_CLKREG(&clk_keypad, "pxa27x-keypad", NULL),
>>  	INIT_CLKREG(&clk_eth, "pxa168-eth", "MFUCLK"),
>>  	INIT_CLKREG(&clk_usb, "pxa168-ehci", "PXA168-USBCLK"),
>> +	INIT_CLKREG(&clk_sdh1, NULL, "PXA-SDHCLK"),
>> +	INIT_CLKREG(&clk_sdh2, NULL, "PXA-SDHCLK"),
>> +	INIT_CLKREG(&clk_sdh3, NULL, "PXA-SDHCLK"),
>> +	INIT_CLKREG(&clk_sdh4, NULL, "PXA-SDHCLK"),
>>  };
>>  
>>  static int __init pxa168_init(void)
>> @@ -173,6 +215,10 @@ PXA168_DEVICE(ssp5, "pxa168-ssp", 4, SSP5, 0xd4021000, 0x40, 60, 61);
>>  PXA168_DEVICE(fb, "pxa168-fb", -1, LCD, 0xd420b000, 0x1c8);
>>  PXA168_DEVICE(keypad, "pxa27x-keypad", -1, KEYPAD, 0xd4012000, 0x4c);
>>  PXA168_DEVICE(eth, "pxa168-eth", -1, MFU, 0xc0800000, 0x0fff);
>> +PXA168_DEVICE(sdh1, "sdhci-pxav2", 0, SDH1, 0xd4280000, 0x100);
>> +PXA168_DEVICE(sdh2, "sdhci-pxav2", 1, SDH1, 0xd4281000, 0x100);
>> +PXA168_DEVICE(sdh3, "sdhci-pxav2", 2, SDH2, 0xd427e000, 0x100);
>> +PXA168_DEVICE(sdh4, "sdhci-pxav2", 3, SDH2, 0xd427f000, 0x100);
>>  
>>  struct resource pxa168_usb_host_resources[] = {
>>  	/* USB Host conroller register base */

-- 
Chris Ball   <cjb@xxxxxxxxxx>   <http://printf.net/>
One Laptop Per Child
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