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authorRajeshwari Shinde <rajeshwari.s@samsung.com>2013-10-08 18:42:22 +0530
committerMinkyu Kang <mk7.kang@samsung.com>2013-12-03 15:26:33 +0900
commit347e45d745e9b90d81752e7567833c835e08e1f3 (patch)
tree2f119ac9d3397da32682c4ad4864805f41b91891
parent771b3ba34ce80215b481e1aaade33bd3089d76a2 (diff)
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exynos: spl: Add a custom spi copy function
This patch implements a custom spi_copy funtion to copy u-boot from SF to RAM. This is faster then iROM spi_copy funtion as this runs spi at 50Mhz and also in WORD mode of operation. Changed a printf in pinmux.c to debug just to avoid the compilation error in SPL. Signed-off-by: Alim Akhtar <alim.akhtar@samsung.com> Signed-off-by: Tom Wai-Hong Tam <waihong@chromium.org> Signed-off-by: Rajeshwari S Shinde <rajeshwari.s@samsung.com> Signed-off-by: Minkyu Kang <mk7.kang@samsung.com>
-rw-r--r--arch/arm/cpu/armv7/exynos/pinmux.c2
-rw-r--r--arch/arm/cpu/armv7/exynos/spl_boot.c122
-rw-r--r--arch/arm/include/asm/arch-exynos/spi.h1
-rw-r--r--include/configs/exynos5250-dt.h2
4 files changed, 123 insertions, 4 deletions
diff --git a/arch/arm/cpu/armv7/exynos/pinmux.c b/arch/arm/cpu/armv7/exynos/pinmux.c
index 8002bce..74cc700 100644
--- a/arch/arm/cpu/armv7/exynos/pinmux.c
+++ b/arch/arm/cpu/armv7/exynos/pinmux.c
@@ -462,7 +462,7 @@ static int exynos4_pinmux_config(int peripheral, int flags)
case PERIPH_ID_SDMMC1:
case PERIPH_ID_SDMMC3:
case PERIPH_ID_SDMMC4:
- printf("SDMMC device %d not implemented\n", peripheral);
+ debug("SDMMC device %d not implemented\n", peripheral);
return -1;
default:
debug("%s: invalid peripheral %d", __func__, peripheral);
diff --git a/arch/arm/cpu/armv7/exynos/spl_boot.c b/arch/arm/cpu/armv7/exynos/spl_boot.c
index 3651c00..6faf13f 100644
--- a/arch/arm/cpu/armv7/exynos/spl_boot.c
+++ b/arch/arm/cpu/armv7/exynos/spl_boot.c
@@ -10,8 +10,11 @@
#include <asm/arch/clock.h>
#include <asm/arch/clk.h>
#include <asm/arch/dmc.h>
+#include <asm/arch/periph.h>
+#include <asm/arch/pinmux.h>
#include <asm/arch/power.h>
#include <asm/arch/spl.h>
+#include <asm/arch/spi.h>
#include "common_setup.h"
#include "clock_init.h"
@@ -59,6 +62,119 @@ static int config_branch_prediction(int set_cr_z)
}
#endif
+static void spi_rx_tx(struct exynos_spi *regs, int todo,
+ void *dinp, void const *doutp, int i)
+{
+ uint *rxp = (uint *)(dinp + (i * (32 * 1024)));
+ int rx_lvl, tx_lvl;
+ uint out_bytes, in_bytes;
+
+ out_bytes = todo;
+ in_bytes = todo;
+ setbits_le32(&regs->ch_cfg, SPI_CH_RST);
+ clrbits_le32(&regs->ch_cfg, SPI_CH_RST);
+ writel(((todo * 8) / 32) | SPI_PACKET_CNT_EN, &regs->pkt_cnt);
+
+ while (in_bytes) {
+ uint32_t spi_sts;
+ int temp;
+
+ spi_sts = readl(&regs->spi_sts);
+ rx_lvl = ((spi_sts >> 15) & 0x7f);
+ tx_lvl = ((spi_sts >> 6) & 0x7f);
+ while (tx_lvl < 32 && out_bytes) {
+ temp = 0xffffffff;
+ writel(temp, &regs->tx_data);
+ out_bytes -= 4;
+ tx_lvl += 4;
+ }
+ while (rx_lvl >= 4 && in_bytes) {
+ temp = readl(&regs->rx_data);
+ if (rxp)
+ *rxp++ = temp;
+ in_bytes -= 4;
+ rx_lvl -= 4;
+ }
+ }
+}
+
+/*
+ * Copy uboot from spi flash to RAM
+ *
+ * @parma uboot_size size of u-boot to copy
+ * @param uboot_addr address in u-boot to copy
+ */
+static void exynos_spi_copy(unsigned int uboot_size, unsigned int uboot_addr)
+{
+ int upto, todo;
+ int i, timeout = 100;
+ struct exynos_spi *regs = (struct exynos_spi *)CONFIG_ENV_SPI_BASE;
+
+ set_spi_clk(PERIPH_ID_SPI1, 50000000); /* set spi clock to 50Mhz */
+ /* set the spi1 GPIO */
+ exynos_pinmux_config(PERIPH_ID_SPI1, PINMUX_FLAG_NONE);
+
+ /* set pktcnt and enable it */
+ writel(4 | SPI_PACKET_CNT_EN, &regs->pkt_cnt);
+ /* set FB_CLK_SEL */
+ writel(SPI_FB_DELAY_180, &regs->fb_clk);
+ /* set CH_WIDTH and BUS_WIDTH as word */
+ setbits_le32(&regs->mode_cfg, SPI_MODE_CH_WIDTH_WORD |
+ SPI_MODE_BUS_WIDTH_WORD);
+ clrbits_le32(&regs->ch_cfg, SPI_CH_CPOL_L); /* CPOL: active high */
+
+ /* clear rx and tx channel if set priveously */
+ clrbits_le32(&regs->ch_cfg, SPI_RX_CH_ON | SPI_TX_CH_ON);
+
+ setbits_le32(&regs->swap_cfg, SPI_RX_SWAP_EN |
+ SPI_RX_BYTE_SWAP |
+ SPI_RX_HWORD_SWAP);
+
+ /* do a soft reset */
+ setbits_le32(&regs->ch_cfg, SPI_CH_RST);
+ clrbits_le32(&regs->ch_cfg, SPI_CH_RST);
+
+ /* now set rx and tx channel ON */
+ setbits_le32(&regs->ch_cfg, SPI_RX_CH_ON | SPI_TX_CH_ON | SPI_CH_HS_EN);
+ clrbits_le32(&regs->cs_reg, SPI_SLAVE_SIG_INACT); /* CS low */
+
+ /* Send read instruction (0x3h) followed by a 24 bit addr */
+ writel((SF_READ_DATA_CMD << 24) | SPI_FLASH_UBOOT_POS, &regs->tx_data);
+
+ /* waiting for TX done */
+ while (!(readl(&regs->spi_sts) & SPI_ST_TX_DONE)) {
+ if (!timeout) {
+ debug("SPI TIMEOUT\n");
+ break;
+ }
+ timeout--;
+ }
+
+ for (upto = 0, i = 0; upto < uboot_size; upto += todo, i++) {
+ todo = min(uboot_size - upto, (1 << 15));
+ spi_rx_tx(regs, todo, (void *)(uboot_addr),
+ (void *)(SPI_FLASH_UBOOT_POS), i);
+ }
+
+ setbits_le32(&regs->cs_reg, SPI_SLAVE_SIG_INACT);/* make the CS high */
+
+ /*
+ * Let put controller mode to BYTE as
+ * SPI driver does not support WORD mode yet
+ */
+ clrbits_le32(&regs->mode_cfg, SPI_MODE_CH_WIDTH_WORD |
+ SPI_MODE_BUS_WIDTH_WORD);
+ writel(0, &regs->swap_cfg);
+
+ /*
+ * Flush spi tx, rx fifos and reset the SPI controller
+ * and clear rx/tx channel
+ */
+ clrsetbits_le32(&regs->ch_cfg, SPI_CH_HS_EN, SPI_CH_RST);
+ clrbits_le32(&regs->ch_cfg, SPI_CH_RST);
+ clrbits_le32(&regs->ch_cfg, SPI_TX_CH_ON | SPI_RX_CH_ON);
+}
+
/*
* Copy U-boot from mmc to RAM:
* COPY_BL2_FNPTR_ADDR: Address in iRAM, which Contains
@@ -70,6 +186,7 @@ void copy_uboot_to_ram(void)
u32 (*copy_bl2)(u32 offset, u32 nblock, u32 dst) = NULL;
u32 offset = 0, size = 0;
+ struct spl_machine_param *param = spl_get_machine_params();
#ifdef CONFIG_SUPPORT_EMMC_BOOT
u32 (*copy_bl2_from_emmc)(u32 nblock, u32 dst);
void (*end_bootop_from_emmc)(void);
@@ -91,9 +208,8 @@ void copy_uboot_to_ram(void)
switch (bootmode) {
#ifdef CONFIG_SPI_BOOTING
case BOOT_MODE_SERIAL:
- offset = SPI_FLASH_UBOOT_POS;
- size = CONFIG_BL2_SIZE;
- copy_bl2 = get_irom_func(SPI_INDEX);
+ /* Customised function to copy u-boot from SF */
+ exynos_spi_copy(param->uboot_size, CONFIG_SYS_TEXT_BASE);
break;
#endif
case BOOT_MODE_MMC:
diff --git a/arch/arm/include/asm/arch-exynos/spi.h b/arch/arm/include/asm/arch-exynos/spi.h
index 147c1a7..0ba931b 100644
--- a/arch/arm/include/asm/arch-exynos/spi.h
+++ b/arch/arm/include/asm/arch-exynos/spi.h
@@ -30,6 +30,7 @@ struct exynos_spi {
#define EXYNOS_SPI_MAX_FREQ 50000000
#define SPI_TIMEOUT_MS 10
+#define SF_READ_DATA_CMD 0x3
/* SPI_CHCFG */
#define SPI_CH_HS_EN (1 << 6)
diff --git a/include/configs/exynos5250-dt.h b/include/configs/exynos5250-dt.h
index 2bd91a5..dee18a7 100644
--- a/include/configs/exynos5250-dt.h
+++ b/include/configs/exynos5250-dt.h
@@ -157,6 +157,7 @@
#define COPY_BL2_FNPTR_ADDR 0x02020030
#define CONFIG_SPL_LIBCOMMON_SUPPORT
+#define CONFIG_SPL_GPIO_SUPPORT
/* specific .lds file */
#define CONFIG_SPL_LDSCRIPT "board/samsung/common/exynos-uboot-spl.lds"
@@ -266,6 +267,7 @@
/* SPI */
#define CONFIG_ENV_IS_IN_SPI_FLASH
#define CONFIG_SPI_FLASH
+#define CONFIG_ENV_SPI_BASE 0x12D30000
#ifdef CONFIG_SPI_FLASH
#define CONFIG_EXYNOS_SPI