Merge branch 'master' of /home/wd/git/u-boot/custodians

1 files changed, 115 insertions, 85 deletions

diff --git a/drivers/spi/mxc_spi.c b/drivers/spi/mxc_spi.c
index d558137..6474eb8 100644
--- a/drivers/spi/mxc_spi.c
+++ b/drivers/spi/mxc_spi.c
@@ -36,16 +36,6 @@
 
 #include <asm/arch/mx31.h>
 
-#define MXC_CSPIRXDATA		0x00
-#define MXC_CSPITXDATA		0x04
-#define MXC_CSPICTRL		0x08
-#define MXC_CSPIINT		0x0C
-#define MXC_CSPIDMA		0x10
-#define MXC_CSPISTAT		0x14
-#define MXC_CSPIPERIOD		0x18
-#define MXC_CSPITEST		0x1C
-#define MXC_CSPIRESET		0x00
-
 #define MXC_CSPICTRL_EN		(1 << 0)
 #define MXC_CSPICTRL_MODE	(1 << 1)
 #define MXC_CSPICTRL_XCH	(1 << 2)
@@ -70,19 +60,12 @@ static unsigned long spi_bases[] = {
 	0x53f84000,
 };
 
+#define mxc_get_clock(x)	mx31_get_ipg_clk()
+
 #elif defined(CONFIG_MX51)
 #include <asm/arch/imx-regs.h>
 #include <asm/arch/clock.h>
 
-#define MXC_CSPIRXDATA		0x00
-#define MXC_CSPITXDATA		0x04
-#define MXC_CSPICTRL		0x08
-#define MXC_CSPICON		0x0C
-#define MXC_CSPIINT		0x10
-#define MXC_CSPIDMA		0x14
-#define MXC_CSPISTAT		0x18
-#define MXC_CSPIPERIOD		0x1C
-#define MXC_CSPIRESET		0x00
 #define MXC_CSPICTRL_EN		(1 << 0)
 #define MXC_CSPICTRL_MODE	(1 << 1)
 #define MXC_CSPICTRL_XCH	(1 << 2)
@@ -111,12 +94,44 @@ static unsigned long spi_bases[] = {
 	CSPI2_BASE_ADDR,
 	CSPI3_BASE_ADDR,
 };
+
+#elif defined(CONFIG_MX35)
+
+#include <asm/arch/imx-regs.h>
+#include <asm/arch/clock.h>
+
+#define MXC_CSPICTRL_EN		(1 << 0)
+#define MXC_CSPICTRL_MODE	(1 << 1)
+#define MXC_CSPICTRL_XCH	(1 << 2)
+#define MXC_CSPICTRL_SMC	(1 << 3)
+#define MXC_CSPICTRL_POL	(1 << 4)
+#define MXC_CSPICTRL_PHA	(1 << 5)
+#define MXC_CSPICTRL_SSCTL	(1 << 6)
+#define MXC_CSPICTRL_SSPOL	(1 << 7)
+#define MXC_CSPICTRL_CHIPSELECT(x)	(((x) & 0x3) << 12)
+#define MXC_CSPICTRL_BITCOUNT(x)	(((x) & 0xfff) << 20)
+#define MXC_CSPICTRL_DATARATE(x)	(((x) & 0x7) << 16)
+#define MXC_CSPICTRL_TC		(1 << 7)
+#define MXC_CSPICTRL_RXOVF	(1 << 6)
+#define MXC_CSPICTRL_MAXBITS	0xfff
+
+#define MXC_CSPIPERIOD_32KHZ	(1 << 15)
+#define MAX_SPI_BYTES	4
+
+static unsigned long spi_bases[] = {
+	0x43fa4000,
+	0x50010000,
+};
+
 #else
 #error "Unsupported architecture"
 #endif
 
 #define OUT	MXC_GPIO_DIRECTION_OUT
 
+#define reg_read readl
+#define reg_write(a, v) writel(v, a)
+
 struct mxc_spi_slave {
 	struct spi_slave slave;
 	unsigned long	base;
@@ -133,16 +148,6 @@ static inline struct mxc_spi_slave *to_mxc_spi_slave(struct spi_slave *slave)
 	return container_of(slave, struct mxc_spi_slave, slave);
 }
 
-static inline u32 reg_read(unsigned long addr)
-{
-	return *(volatile unsigned long*)addr;
-}
-
-static inline void reg_write(unsigned long addr, u32 val)
-{
-	*(volatile unsigned long*)addr = val;
-}
-
 void spi_cs_activate(struct spi_slave *slave)
 {
 	struct mxc_spi_slave *mxcs = to_mxc_spi_slave(slave);
@@ -158,24 +163,73 @@ void spi_cs_deactivate(struct spi_slave *slave)
 			      !(mxcs->ss_pol));
 }
 
-#ifdef CONFIG_MX51
-static s32 spi_cfg(struct mxc_spi_slave *mxcs, unsigned int cs,
+u32 get_cspi_div(u32 div)
+{
+	int i;
+
+	for (i = 0; i < 8; i++) {
+		if (div <= (4 << i))
+			return i;
+	}
+	return i;
+}
+
+#if defined(CONFIG_MX31) || defined(CONFIG_MX35)
+static s32 spi_cfg_mxc(struct mxc_spi_slave *mxcs, unsigned int cs,
+		unsigned int max_hz, unsigned int mode)
+{
+	unsigned int ctrl_reg;
+	u32 clk_src;
+	u32 div;
+
+	clk_src = mxc_get_clock(MXC_CSPI_CLK);
+
+	div = clk_src / max_hz;
+	div = get_cspi_div(div);
+
+	debug("clk %d Hz, div %d, real clk %d Hz\n",
+		max_hz, div, clk_src / (4 << div));
+
+	ctrl_reg = MXC_CSPICTRL_CHIPSELECT(cs) |
+		MXC_CSPICTRL_BITCOUNT(MXC_CSPICTRL_MAXBITS) |
+		MXC_CSPICTRL_DATARATE(div) |
+		MXC_CSPICTRL_EN |
+#ifdef CONFIG_MX35
+		MXC_CSPICTRL_SSCTL |
+#endif
+		MXC_CSPICTRL_MODE;
+
+	if (mode & SPI_CPHA)
+		ctrl_reg |= MXC_CSPICTRL_PHA;
+	if (mode & SPI_CPOL)
+		ctrl_reg |= MXC_CSPICTRL_POL;
+	if (mode & SPI_CS_HIGH)
+		ctrl_reg |= MXC_CSPICTRL_SSPOL;
+	mxcs->ctrl_reg = ctrl_reg;
+
+	return 0;
+}
+#endif
+
+#if defined(CONFIG_MX51)
+static s32 spi_cfg_mxc(struct mxc_spi_slave *mxcs, unsigned int cs,
 		unsigned int max_hz, unsigned int mode)
 {
 	u32 clk_src = mxc_get_clock(MXC_CSPI_CLK);
 	s32 pre_div = 0, post_div = 0, i, reg_ctrl, reg_config;
 	u32 ss_pol = 0, sclkpol = 0, sclkpha = 0;
+	struct cspi_regs *regs = (struct cspi_regs *)mxcs->base;
 
 	if (max_hz == 0) {
 		printf("Error: desired clock is 0\n");
 		return -1;
 	}
 
-	reg_ctrl = reg_read(mxcs->base + MXC_CSPICTRL);
+	reg_ctrl = reg_read(&regs->ctrl);
 
 	/* Reset spi */
-	reg_write(mxcs->base + MXC_CSPICTRL, 0);
-	reg_write(mxcs->base + MXC_CSPICTRL, (reg_ctrl | 0x1));
+	reg_write(&regs->ctrl, 0);
+	reg_write(&regs->ctrl, (reg_ctrl | 0x1));
 
 	/*
 	 * The following computation is taken directly from Freescale's code.
@@ -223,11 +277,11 @@ static s32 spi_cfg(struct mxc_spi_slave *mxcs, unsigned int cs,
 	if (mode & SPI_CPHA)
 		sclkpha = 1;
 
-	reg_config = reg_read(mxcs->base + MXC_CSPICON);
+	reg_config = reg_read(&regs->cfg);
 
 	/*
 	 * Configuration register setup
-	 * The MX51 has support different setup for each SS
+	 * The MX51 supports different setup for each SS
 	 */
 	reg_config = (reg_config & ~(1 << (cs + MXC_CSPICON_SSPOL))) |
 		(ss_pol << (cs + MXC_CSPICON_SSPOL));
@@ -237,18 +291,17 @@ static s32 spi_cfg(struct mxc_spi_slave *mxcs, unsigned int cs,
 		(sclkpha << (cs + MXC_CSPICON_PHA));
 
 	debug("reg_ctrl = 0x%x\n", reg_ctrl);
-	reg_write(mxcs->base + MXC_CSPICTRL, reg_ctrl);
+	reg_write(&regs->ctrl, reg_ctrl);
 	debug("reg_config = 0x%x\n", reg_config);
-	reg_write(mxcs->base + MXC_CSPICON, reg_config);
+	reg_write(&regs->cfg, reg_config);
 
 	/* save config register and control register */
 	mxcs->ctrl_reg = reg_ctrl;
 	mxcs->cfg_reg = reg_config;
 
 	/* clear interrupt reg */
-	reg_write(mxcs->base + MXC_CSPIINT, 0);
-	reg_write(mxcs->base + MXC_CSPISTAT,
-		MXC_CSPICTRL_TC | MXC_CSPICTRL_RXOVF);
+	reg_write(&regs->intr, 0);
+	reg_write(&regs->stat, MXC_CSPICTRL_TC | MXC_CSPICTRL_RXOVF);
 
 	return 0;
 }
@@ -260,6 +313,7 @@ int spi_xchg_single(struct spi_slave *slave, unsigned int bitlen,
 	struct mxc_spi_slave *mxcs = to_mxc_spi_slave(slave);
 	int nbytes = (bitlen + 7) / 8;
 	u32 data, cnt, i;
+	struct cspi_regs *regs = (struct cspi_regs *)mxcs->base;
 
 	debug("%s: bitlen %d dout 0x%x din 0x%x\n",
 		__func__, bitlen, (u32)dout, (u32)din);
@@ -268,14 +322,13 @@ int spi_xchg_single(struct spi_slave *slave, unsigned int bitlen,
 		~MXC_CSPICTRL_BITCOUNT(MXC_CSPICTRL_MAXBITS)) |
 		MXC_CSPICTRL_BITCOUNT(bitlen - 1);
 
-	reg_write(mxcs->base + MXC_CSPICTRL, mxcs->ctrl_reg | MXC_CSPICTRL_EN);
+	reg_write(&regs->ctrl, mxcs->ctrl_reg | MXC_CSPICTRL_EN);
 #ifdef CONFIG_MX51
-	reg_write(mxcs->base + MXC_CSPICON, mxcs->cfg_reg);
+	reg_write(&regs->cfg, mxcs->cfg_reg);
 #endif
 
 	/* Clear interrupt register */
-	reg_write(mxcs->base + MXC_CSPISTAT,
-		MXC_CSPICTRL_TC | MXC_CSPICTRL_RXOVF);
+	reg_write(&regs->stat, MXC_CSPICTRL_TC | MXC_CSPICTRL_RXOVF);
 
 	/*
 	 * The SPI controller works only with words,
@@ -292,7 +345,7 @@ int spi_xchg_single(struct spi_slave *slave, unsigned int bitlen,
 		}
 		debug("Sending SPI 0x%x\n", data);
 
-		reg_write(mxcs->base + MXC_CSPITXDATA, data);
+		reg_write(&regs->txdata, data);
 		nbytes -= cnt;
 	}
 
@@ -304,9 +357,8 @@ int spi_xchg_single(struct spi_slave *slave, unsigned int bitlen,
 			/* Buffer is not 32-bit aligned */
 			if ((unsigned long)dout & 0x03) {
 				data = 0;
-				for (i = 0; i < 4; i++, data <<= 8) {
+				for (i = 0; i < 4; i++)
 					data = (data << 8) | (*dout++ & 0xFF);
-				}
 			} else {
 				data = *(u32 *)dout;
 				data = cpu_to_be32(data);
@@ -314,41 +366,40 @@ int spi_xchg_single(struct spi_slave *slave, unsigned int bitlen,
 			dout += 4;
 		}
 		debug("Sending SPI 0x%x\n", data);
-		reg_write(mxcs->base + MXC_CSPITXDATA, data);
+		reg_write(&regs->txdata, data);
 		nbytes -= 4;
 	}
 
 	/* FIFO is written, now starts the transfer setting the XCH bit */
-	reg_write(mxcs->base + MXC_CSPICTRL, mxcs->ctrl_reg |
+	reg_write(&regs->ctrl, mxcs->ctrl_reg |
 		MXC_CSPICTRL_EN | MXC_CSPICTRL_XCH);
 
 	/* Wait until the TC (Transfer completed) bit is set */
-	while ((reg_read(mxcs->base + MXC_CSPISTAT) & MXC_CSPICTRL_TC) == 0)
+	while ((reg_read(&regs->stat) & MXC_CSPICTRL_TC) == 0)
 		;
 
 	/* Transfer completed, clear any pending request */
-	reg_write(mxcs->base + MXC_CSPISTAT,
-		MXC_CSPICTRL_TC | MXC_CSPICTRL_RXOVF);
+	reg_write(&regs->stat, MXC_CSPICTRL_TC | MXC_CSPICTRL_RXOVF);
 
 	nbytes = (bitlen + 7) / 8;
 
 	cnt = nbytes % 32;
 
 	if (bitlen % 32) {
-		data = reg_read(mxcs->base + MXC_CSPIRXDATA);
+		data = reg_read(&regs->rxdata);
 		cnt = (bitlen % 32) / 8;
+		data = cpu_to_be32(data) >> ((sizeof(data) - cnt) * 8);
 		debug("SPI Rx unaligned: 0x%x\n", data);
 		if (din) {
-			for (i = 0; i < cnt; i++, data >>= 8) {
-				*din++ = data & 0xFF;
-			}
+			memcpy(din, &data, cnt);
+			din += cnt;
 		}
 		nbytes -= cnt;
 	}
 
 	while (nbytes > 0) {
 		u32 tmp;
-		tmp = reg_read(mxcs->base + MXC_CSPIRXDATA);
+		tmp = reg_read(&regs->rxdata);
 		data = cpu_to_be32(tmp);
 		debug("SPI Rx: 0x%x 0x%x\n", tmp, data);
 		cnt = min(nbytes, sizeof(data));
@@ -363,7 +414,6 @@ int spi_xchg_single(struct spi_slave *slave, unsigned int bitlen,
 
 }
 
-
 int spi_xfer(struct spi_slave *slave, unsigned int bitlen, const void *dout,
 		void *din, unsigned long flags)
 {
@@ -381,7 +431,6 @@ int spi_xfer(struct spi_slave *slave, unsigned int bitlen, const void *dout,
 		spi_cs_activate(slave);
 
 	while (n_bytes > 0) {
-
 		if (n_bytes < MAX_SPI_BYTES)
 			blk_size = n_bytes;
 		else
@@ -441,7 +490,6 @@ static int decode_cs(struct mxc_spi_slave *mxcs, unsigned int cs)
 struct spi_slave *spi_setup_slave(unsigned int bus, unsigned int cs,
 			unsigned int max_hz, unsigned int mode)
 {
-	unsigned int ctrl_reg;
 	struct mxc_spi_slave *mxcs;
 	int ret;
 
@@ -467,30 +515,12 @@ struct spi_slave *spi_setup_slave(unsigned int bus, unsigned int cs,
 	mxcs->base = spi_bases[bus];
 	mxcs->ss_pol = (mode & SPI_CS_HIGH) ? 1 : 0;
 
-#ifdef CONFIG_MX51
-	/* Can be used for i.MX31 too ? */
-	ctrl_reg = 0;
-	ret = spi_cfg(mxcs, cs, max_hz, mode);
+	ret = spi_cfg_mxc(mxcs, cs, max_hz, mode);
 	if (ret) {
 		printf("mxc_spi: cannot setup SPI controller\n");
 		free(mxcs);
 		return NULL;
 	}
-#else
-	ctrl_reg = MXC_CSPICTRL_CHIPSELECT(cs) |
-		MXC_CSPICTRL_BITCOUNT(31) |
-		MXC_CSPICTRL_DATARATE(7) | /* FIXME: calculate data rate */
-		MXC_CSPICTRL_EN |
-		MXC_CSPICTRL_MODE;
-
-	if (mode & SPI_CPHA)
-		ctrl_reg |= MXC_CSPICTRL_PHA;
-	if (mode & SPI_CPOL)
-		ctrl_reg |= MXC_CSPICTRL_POL;
-	if (mode & SPI_CS_HIGH)
-		ctrl_reg |= MXC_CSPICTRL_SSPOL;
-	mxcs->ctrl_reg = ctrl_reg;
-#endif
 	return &mxcs->slave;
 }
 
@@ -504,13 +534,13 @@ void spi_free_slave(struct spi_slave *slave)
 int spi_claim_bus(struct spi_slave *slave)
 {
 	struct mxc_spi_slave *mxcs = to_mxc_spi_slave(slave);
+	struct cspi_regs *regs = (struct cspi_regs *)mxcs->base;
 
-	reg_write(mxcs->base + MXC_CSPIRESET, 1);
+	reg_write(&regs->rxdata, 1);
 	udelay(1);
-	reg_write(mxcs->base + MXC_CSPICTRL, mxcs->ctrl_reg);
-	reg_write(mxcs->base + MXC_CSPIPERIOD,
-		  MXC_CSPIPERIOD_32KHZ);
-	reg_write(mxcs->base + MXC_CSPIINT, 0);
+	reg_write(&regs->ctrl, mxcs->ctrl_reg);
+	reg_write(&regs->period, MXC_CSPIPERIOD_32KHZ);
+	reg_write(&regs->intr, 0);
 
 	return 0;
 }