[PATCH v4 2/4] ARM: pxa168: Add SDHCI support
Tanmay Upadhyay
tanmay.upadhyay at einfochips.com
Tue Dec 20 08:13:01 EST 2011
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
v4 - Use different names for SD clock registers for PXA168 instead
of redefining them in pxa168.c. Suggested by Haojian Zhuang
Signed-off-by: Tanmay Upadhyay <tanmay.upadhyay at einfochips.com>
Reviewed-by: Philip Rakity <prakity at marvell.com>
---
arch/arm/mach-mmp/include/mach/pxa168.h | 20 ++++++++++++++
arch/arm/mach-mmp/include/mach/regs-apmu.h | 40 ++++++++++++++-------------
arch/arm/mach-mmp/pxa168.c | 39 +++++++++++++++++++++++++++
3 files changed, 80 insertions(+), 19 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/include/mach/regs-apmu.h b/arch/arm/mach-mmp/include/mach/regs-apmu.h
index 8447ac6..a84de77 100644
--- a/arch/arm/mach-mmp/include/mach/regs-apmu.h
+++ b/arch/arm/mach-mmp/include/mach/regs-apmu.h
@@ -17,27 +17,29 @@
#define APMU_REG(x) (APMU_VIRT_BASE + (x))
/* Clock Reset Control */
-#define APMU_IRE APMU_REG(0x048)
-#define APMU_LCD APMU_REG(0x04c)
-#define APMU_CCIC APMU_REG(0x050)
-#define APMU_SDH0 APMU_REG(0x054)
-#define APMU_SDH1 APMU_REG(0x058)
-#define APMU_USB APMU_REG(0x05c)
-#define APMU_NAND APMU_REG(0x060)
-#define APMU_DMA APMU_REG(0x064)
-#define APMU_GEU APMU_REG(0x068)
-#define APMU_BUS APMU_REG(0x06c)
-#define APMU_SDH2 APMU_REG(0x0e8)
-#define APMU_SDH3 APMU_REG(0x0ec)
-#define APMU_ETH APMU_REG(0x0fc)
-
-#define APMU_FNCLK_EN (1 << 4)
-#define APMU_AXICLK_EN (1 << 3)
-#define APMU_FNRST_DIS (1 << 1)
-#define APMU_AXIRST_DIS (1 << 0)
+#define APMU_IRE APMU_REG(0x048)
+#define APMU_LCD APMU_REG(0x04c)
+#define APMU_CCIC APMU_REG(0x050)
+#define APMU_SDH0 APMU_REG(0x054)
+#define APMU_SDH1 APMU_REG(0x058)
+#define APMU_USB APMU_REG(0x05c)
+#define APMU_NAND APMU_REG(0x060)
+#define APMU_DMA APMU_REG(0x064)
+#define APMU_GEU APMU_REG(0x068)
+#define APMU_BUS APMU_REG(0x06c)
+#define APMU_PXA168_SDH2 APMU_REG(0x0e0)
+#define APMU_PXA168_SDH3 APMU_REG(0x0e4)
+#define APMU_SDH2 APMU_REG(0x0e8)
+#define APMU_SDH3 APMU_REG(0x0ec)
+#define APMU_ETH APMU_REG(0x0fc)
+
+#define APMU_FNCLK_EN (1 << 4)
+#define APMU_AXICLK_EN (1 << 3)
+#define APMU_FNRST_DIS (1 << 1)
+#define APMU_AXIRST_DIS (1 << 0)
/* Wake Clear Register */
-#define APMU_WAKE_CLR APMU_REG(0x07c)
+#define APMU_WAKE_CLR APMU_REG(0x07c)
#define APMU_PXA168_KP_WAKE_CLR (1 << 7)
#define APMU_PXA168_CFI_WAKE_CLR (1 << 6)
diff --git a/arch/arm/mach-mmp/pxa168.c b/arch/arm/mach-mmp/pxa168.c
index 76ca15c..023659b 100644
--- a/arch/arm/mach-mmp/pxa168.c
+++ b/arch/arm/mach-mmp/pxa168.c
@@ -65,6 +65,32 @@ void __init pxa168_init_irq(void)
pxa168_init_gpio();
}
+static void sdh_clk_enable(struct clk *clk)
+{
+ void __iomem *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 (reg_offset == APMU_SDH0 || reg_offset == APMU_SDH1)
+ __raw_writel(__raw_readl(APMU_SDH0) | 0x9, APMU_SDH0);
+ if (reg_offset == APMU_PXA168_SDH2 || reg_offset == APMU_PXA168_SDH3)
+ __raw_writel(__raw_readl(APMU_PXA168_SDH2) | 0x9,
+ APMU_PXA168_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 +113,11 @@ 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, PXA168_SDH2, 0x12, 48000000, &sdh_clk_ops);
+static APMU_CLK_OPS(sdh4, PXA168_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 +139,10 @@ 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 +208,10 @@ 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 */
--
1.7.0.4
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