ARM: sa1100: Refactor mcp-sa11x0 to use platform resources.

Make use of memory resources rather than hardcoded IO adresses.
This is a first step towards DT support.

Signed-off-by: Jochen Friedrich <jochen@scram.de>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>

1 files changed, 110 insertions, 52 deletions

diff --git a/drivers/mfd/mcp-sa11x0.c b/drivers/mfd/mcp-sa11x0.c
index da4e077a1be..9adc2eb6949 100644
--- a/drivers/mfd/mcp-sa11x0.c
+++ b/drivers/mfd/mcp-sa11x0.c
@@ -19,6 +19,7 @@
 #include <linux/spinlock.h>
 #include <linux/platform_device.h>
 #include <linux/mfd/mcp.h>
+#include <linux/io.h>
 
 #include <mach/dma.h>
 #include <mach/hardware.h>
@@ -26,12 +27,19 @@
 #include <asm/system.h>
 #include <mach/mcp.h>
 
-#include <mach/assabet.h>
-
+/* Register offsets */
+#define MCCR0   0x00
+#define MCDR0   0x08
+#define MCDR1   0x0C
+#define MCDR2   0x10
+#define MCSR    0x18
+#define MCCR1   0x00
 
 struct mcp_sa11x0 {
-        u32     mccr0;
-        u32     mccr1;
+        u32             mccr0;
+        u32             mccr1;
+        unsigned char   *mccr0_base;
+        unsigned char   *mccr1_base;
 };
 
 #define priv(mcp)       ((struct mcp_sa11x0 *)mcp_priv(mcp))
@@ -39,25 +47,25 @@ struct mcp_sa11x0 {
 static void
 mcp_sa11x0_set_telecom_divisor(struct mcp *mcp, unsigned int divisor)
 {
-        unsigned int mccr0;
+        struct mcp_sa11x0 *priv = priv(mcp);
 
         divisor /= 32;
 
-        mccr0 = Ser4MCCR0 & ~0x00007f00;
-        mccr0 |= divisor << 8;
-        Ser4MCCR0 = mccr0;
+        priv->mccr0 &= ~0x00007f00;
+        priv->mccr0 |= divisor << 8;
+        __raw_writel(priv->mccr0, priv->mccr0_base + MCCR0);
 }
 
 static void
 mcp_sa11x0_set_audio_divisor(struct mcp *mcp, unsigned int divisor)
 {
-        unsigned int mccr0;
+        struct mcp_sa11x0 *priv = priv(mcp);
 
         divisor /= 32;
 
-        mccr0 = Ser4MCCR0 & ~0x0000007f;
-        mccr0 |= divisor;
-        Ser4MCCR0 = mccr0;
+        priv->mccr0 &= ~0x0000007f;
+        priv->mccr0 |= divisor;
+        __raw_writel(priv->mccr0, priv->mccr0_base + MCCR0);
 }
 
 /*
@@ -71,12 +79,16 @@ mcp_sa11x0_write(struct mcp *mcp, unsigned int reg, unsigned int val)
 {
         int ret = -ETIME;
         int i;
+        u32 mcpreg;
+        struct mcp_sa11x0 *priv = priv(mcp);
 
-        Ser4MCDR2 = reg << 17 | MCDR2_Wr | (val & 0xffff);
+        mcpreg = reg << 17 | MCDR2_Wr | (val & 0xffff);
+        __raw_writel(mcpreg, priv->mccr0_base + MCDR2);
 
         for (i = 0; i < 2; i++) {
                 udelay(mcp->rw_timeout);
-                if (Ser4MCSR & MCSR_CWC) {
+                mcpreg = __raw_readl(priv->mccr0_base + MCSR);
+                if (mcpreg & MCSR_CWC) {
                         ret = 0;
                         break;
                 }
@@ -97,13 +109,18 @@ mcp_sa11x0_read(struct mcp *mcp, unsigned int reg)
 {
         int ret = -ETIME;
         int i;
+        u32 mcpreg;
+        struct mcp_sa11x0 *priv = priv(mcp);
 
-        Ser4MCDR2 = reg << 17 | MCDR2_Rd;
+        mcpreg = reg << 17 | MCDR2_Rd;
+        __raw_writel(mcpreg, priv->mccr0_base + MCDR2);
 
         for (i = 0; i < 2; i++) {
                 udelay(mcp->rw_timeout);
-                if (Ser4MCSR & MCSR_CRC) {
-                        ret = Ser4MCDR2 & 0xffff;
+                mcpreg = __raw_readl(priv->mccr0_base + MCSR);
+                if (mcpreg & MCSR_CRC) {
+                        ret = __raw_readl(priv->mccr0_base + MCDR2)
+                                & 0xffff;
                         break;
                 }
         }
@@ -116,13 +133,19 @@ mcp_sa11x0_read(struct mcp *mcp, unsigned int reg)
 
 static void mcp_sa11x0_enable(struct mcp *mcp)
 {
-        Ser4MCSR = -1;
-        Ser4MCCR0 |= MCCR0_MCE;
+        struct mcp_sa11x0 *priv = priv(mcp);
+
+        __raw_writel(-1, priv->mccr0_base + MCSR);
+        priv->mccr0 |= MCCR0_MCE;
+        __raw_writel(priv->mccr0, priv->mccr0_base + MCCR0);
 }
 
 static void mcp_sa11x0_disable(struct mcp *mcp)
 {
-        Ser4MCCR0 &= ~MCCR0_MCE;
+        struct mcp_sa11x0 *priv = priv(mcp);
+
+        priv->mccr0 &= ~MCCR0_MCE;
+        __raw_writel(priv->mccr0, priv->mccr0_base + MCCR0);
 }
 
 /*
@@ -142,6 +165,9 @@ static int mcp_sa11x0_probe(struct platform_device *pdev)
         struct mcp_plat_data *data = pdev->dev.platform_data;
         struct mcp *mcp;
         int ret;
+        struct mcp_sa11x0 *priv;
+        struct resource *res_mem0, *res_mem1;
+        u32 size0, size1;
 
         if (!data)
                 return -ENODEV;
@@ -149,46 +175,59 @@ static int mcp_sa11x0_probe(struct platform_device *pdev)
         if (!data->codec)
                 return -ENODEV;
 
-        if (!request_mem_region(0x80060000, 0x60, "sa11x0-mcp"))
+        res_mem0 = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+        if (!res_mem0)
+                return -ENODEV;
+        size0 = res_mem0->end - res_mem0->start + 1;
+
+        res_mem1 = platform_get_resource(pdev, IORESOURCE_MEM, 1);
+        if (!res_mem1)
+                return -ENODEV;
+        size1 = res_mem1->end - res_mem1->start + 1;
+
+        if (!request_mem_region(res_mem0->start, size0, "sa11x0-mcp"))
                 return -EBUSY;
 
+        if (!request_mem_region(res_mem1->start, size1, "sa11x0-mcp")) {
+                ret = -EBUSY;
+                goto release;
+        }
+
         mcp = mcp_host_alloc(&pdev->dev, sizeof(struct mcp_sa11x0));
         if (!mcp) {
                 ret = -ENOMEM;
-                goto release;
+                goto release2;
         }
 
+        priv = priv(mcp);
+
         mcp->owner              = THIS_MODULE;
         mcp->ops                = &mcp_sa11x0;
         mcp->sclk_rate          = data->sclk_rate;
-        mcp->dma_audio_rd       = DMA_Ser4MCP0Rd;
-        mcp->dma_audio_wr       = DMA_Ser4MCP0Wr;
-        mcp->dma_telco_rd       = DMA_Ser4MCP1Rd;
-        mcp->dma_telco_wr       = DMA_Ser4MCP1Wr;
+        mcp->dma_audio_rd       = DDAR_DevAdd(res_mem0->start + MCDR0)
+                                + DDAR_DevRd + DDAR_Brst4 + DDAR_8BitDev;
+        mcp->dma_audio_wr       = DDAR_DevAdd(res_mem0->start + MCDR0)
+                                + DDAR_DevWr + DDAR_Brst4 + DDAR_8BitDev;
+        mcp->dma_telco_rd       = DDAR_DevAdd(res_mem0->start + MCDR1)
+                                + DDAR_DevRd + DDAR_Brst4 + DDAR_8BitDev;
+        mcp->dma_telco_wr       = DDAR_DevAdd(res_mem0->start + MCDR1)
+                                + DDAR_DevWr + DDAR_Brst4 + DDAR_8BitDev;
         mcp->codec              = data->codec;
 
         platform_set_drvdata(pdev, mcp);
 
-        if (machine_is_assabet()) {
-                ASSABET_BCR_set(ASSABET_BCR_CODEC_RST);
-        }
-
-        /*
-         * Setup the PPC unit correctly.
-         */
-        PPDR &= ~PPC_RXD4;
-        PPDR |= PPC_TXD4 | PPC_SCLK | PPC_SFRM;
-        PSDR |= PPC_RXD4;
-        PSDR &= ~(PPC_TXD4 | PPC_SCLK | PPC_SFRM);
-        PPSR &= ~(PPC_TXD4 | PPC_SCLK | PPC_SFRM);
-
         /*
          * Initialise device.  Note that we initially
          * set the sampling rate to minimum.
          */
-        Ser4MCSR = -1;
-        Ser4MCCR1 = data->mccr1;
-        Ser4MCCR0 = data->mccr0 | 0x7f7f;
+        priv->mccr0_base = ioremap(res_mem0->start, size0);
+        priv->mccr1_base = ioremap(res_mem1->start, size1);
+
+        __raw_writel(-1, priv->mccr0_base + MCSR);
+        priv->mccr1 = data->mccr1;
+        priv->mccr0 = data->mccr0 | 0x7f7f;
+        __raw_writel(priv->mccr0, priv->mccr0_base + MCCR0);
+        __raw_writel(priv->mccr1, priv->mccr1_base + MCCR1);
 
         /*
          * Calculate the read/write timeout (us) from the bit clock
@@ -202,32 +241,49 @@ static int mcp_sa11x0_probe(struct platform_device *pdev)
         if (ret == 0)
                 goto out;
 
+ release2:
+        release_mem_region(res_mem1->start, size1);
  release:
-        release_mem_region(0x80060000, 0x60);
+        release_mem_region(res_mem0->start, size0);
         platform_set_drvdata(pdev, NULL);
 
  out:
         return ret;
 }
 
-static int mcp_sa11x0_remove(struct platform_device *dev)
+static int mcp_sa11x0_remove(struct platform_device *pdev)
 {
-        struct mcp *mcp = platform_get_drvdata(dev);
+        struct mcp *mcp = platform_get_drvdata(pdev);
+        struct mcp_sa11x0 *priv = priv(mcp);
+        struct resource *res_mem;
+        u32 size;
 
-        platform_set_drvdata(dev, NULL);
+        platform_set_drvdata(pdev, NULL);
         mcp_host_unregister(mcp);
-        release_mem_region(0x80060000, 0x60);
 
+        res_mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+        if (res_mem) {
+                size = res_mem->end - res_mem->start + 1;
+                release_mem_region(res_mem->start, size);
+        }
+        res_mem = platform_get_resource(pdev, IORESOURCE_MEM, 1);
+        if (res_mem) {
+                size = res_mem->end - res_mem->start + 1;
+                release_mem_region(res_mem->start, size);
+        }
+        iounmap(priv->mccr0_base);
+        iounmap(priv->mccr1_base);
         return 0;
 }
 
 static int mcp_sa11x0_suspend(struct platform_device *dev, pm_message_t state)
 {
         struct mcp *mcp = platform_get_drvdata(dev);
+        struct mcp_sa11x0 *priv = priv(mcp);
+        u32 mccr0;
 
-        priv(mcp)->mccr0 = Ser4MCCR0;
-        priv(mcp)->mccr1 = Ser4MCCR1;
-        Ser4MCCR0 &= ~MCCR0_MCE;
+        mccr0 = priv->mccr0 & ~MCCR0_MCE;
+        __raw_writel(mccr0, priv->mccr0_base + MCCR0);
 
         return 0;
 }
@@ -235,9 +291,10 @@ static int mcp_sa11x0_suspend(struct platform_device *dev, pm_message_t state)
 static int mcp_sa11x0_resume(struct platform_device *dev)
 {
         struct mcp *mcp = platform_get_drvdata(dev);
+        struct mcp_sa11x0 *priv = priv(mcp);
 
-        Ser4MCCR1 = priv(mcp)->mccr1;
-        Ser4MCCR0 = priv(mcp)->mccr0;
+        __raw_writel(priv->mccr0, priv->mccr0_base + MCCR0);
+        __raw_writel(priv->mccr1, priv->mccr1_base + MCCR1);
 
         return 0;
 }
@@ -254,6 +311,7 @@ static struct platform_driver mcp_sa11x0_driver = {
         .resume         = mcp_sa11x0_resume,
         .driver         = {
                 .name   = "sa11x0-mcp",
+                .owner  = THIS_MODULE,
         },
 };