[U-Boot] [PATCH V3] exynos: spl: Add a custom spi copy function
Minkyu Kang
mk7.kang at samsung.com
Tue Dec 3 07:30:21 CET 2013
On 02/12/13 22:17, Rajeshwari Birje wrote:
> Hi Minkyu Kang,
>
> Thank you for comments.
>
>
>
> On Mon, Dec 2, 2013 at 2:18 PM, Minkyu Kang <mk7.kang at samsung.com> wrote:
>> On 09/10/13 16:55, Rajeshwari Birje wrote:
>>> Hi Minkyu Kang,
>>>
>>> Since this patch is related to arch/arm spi booting, I had a doubt
>>> where would it get merged in u-boot-samsung.git or u-boot-spi.git.
>>>
>>> This patch is based on "[U-Boot] [PATCH 4/4] spi: exynos: Support word
>>> transfers" which is already merged in u-boot-spi.git.
>>
>> Now, that patch is merged to u-boot-samsung.
>> Anyway I'm OK to pick this patch to u-boot-spi.
>>
>>>
>>> Regards,
>>> Rajeshwari Shinde.
>>>
>>> On Tue, Oct 8, 2013 at 6:42 PM, Rajeshwari S Shinde
>>> <rajeshwari.s at samsung.com> wrote:
>>>> 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 at samsung.com>
>>>> Signed-off-by: Tom Wai-Hong Tam <waihong at chromium.org>
>>>> Signed-off-by: Rajeshwari S Shinde <rajeshwari.s at samsung.com>
>>>> ---
>>>> Based on following patch yet to be merged:
>>>> "[U-Boot] [PATCH 4/4] spi: exynos: Support word transfers"
>>>> Changes in V2:
>>>> - Corrected the commit message.
>>>> - Added a SPI timeout check.
>>>> - Corrected the comments.
>>>> Changes in V3:
>>>> - Rebased on the latest u-boot-spi tree.
>>>> arch/arm/cpu/armv7/exynos/pinmux.c | 2 +-
>>>> arch/arm/cpu/armv7/exynos/spl_boot.c | 122 ++++++++++++++++++++++++++++++++-
>>>> arch/arm/include/asm/arch-exynos/spi.h | 1 +
>>>> include/configs/exynos5250-dt.h | 2 +
>>>> 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);
>>
>> unrelated change.
>>
> As mentioned commit message
> "Changed a printf in pinmux.c to debug just to avoid the compilation
> error in SPL."
>>>> 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(®s->ch_cfg, SPI_CH_RST);
>>>> + clrbits_le32(®s->ch_cfg, SPI_CH_RST);
>>>> + writel(((todo * 8) / 32) | SPI_PACKET_CNT_EN, ®s->pkt_cnt);
>>>> +
>>>> + while (in_bytes) {
>>>> + uint32_t spi_sts;
>>>> + int temp;
>>>> +
>>>> + spi_sts = readl(®s->spi_sts);
>>>> + rx_lvl = ((spi_sts >> 15) & 0x7f);
>>>> + tx_lvl = ((spi_sts >> 6) & 0x7f);
>>>> + while (tx_lvl < 32 && out_bytes) {
>>>> + temp = 0xffffffff;
>>>> + writel(temp, ®s->tx_data);
>>>> + out_bytes -= 4;
>>>> + tx_lvl += 4;
>>>> + }
>>>> + while (rx_lvl >= 4 && in_bytes) {
>>>> + temp = readl(®s->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, ®s->pkt_cnt);
>>>> + /* set FB_CLK_SEL */
>>>> + writel(SPI_FB_DELAY_180, ®s->fb_clk);
>>>> + /* set CH_WIDTH and BUS_WIDTH as word */
>>>> + setbits_le32(®s->mode_cfg, SPI_MODE_CH_WIDTH_WORD |
>>>> + SPI_MODE_BUS_WIDTH_WORD);
>>>> + clrbits_le32(®s->ch_cfg, SPI_CH_CPOL_L); /* CPOL: active high */
>>>> +
>>>> + /* clear rx and tx channel if set priveously */
>>>> + clrbits_le32(®s->ch_cfg, SPI_RX_CH_ON | SPI_TX_CH_ON);
>>>> +
>>>> + setbits_le32(®s->swap_cfg, SPI_RX_SWAP_EN |
>>>> + SPI_RX_BYTE_SWAP |
>>>> + SPI_RX_HWORD_SWAP);
>>>> +
>>>> + /* do a soft reset */
>>>> + setbits_le32(®s->ch_cfg, SPI_CH_RST);
>>>> + clrbits_le32(®s->ch_cfg, SPI_CH_RST);
>>>> +
>>>> + /* now set rx and tx channel ON */
>>>> + setbits_le32(®s->ch_cfg, SPI_RX_CH_ON | SPI_TX_CH_ON | SPI_CH_HS_EN);
>>>> + clrbits_le32(®s->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, ®s->tx_data);
>>>> +
>>>> + /* waiting for TX done */
>>>> + while (!(readl(®s->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(®s->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(®s->mode_cfg, SPI_MODE_CH_WIDTH_WORD |
>>>> + SPI_MODE_BUS_WIDTH_WORD);
>>>> + writel(0, ®s->swap_cfg);
>>>> +
>>>> + /*
>>>> + * Flush spi tx, rx fifos and reset the SPI controller
>>>> + * and clear rx/tx channel
>>>> + */
>>>> + clrsetbits_le32(®s->ch_cfg, SPI_CH_HS_EN, SPI_CH_RST);
>>>> + clrbits_le32(®s->ch_cfg, SPI_CH_RST);
>>>> + clrbits_le32(®s->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 8c21909..1d32396 100644
>>>> --- a/include/configs/exynos5250-dt.h
>>>> +++ b/include/configs/exynos5250-dt.h
>>>> @@ -154,6 +154,7 @@
>>>> #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"
>>>> @@ -292,6 +293,7 @@
>>>> /* 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
>>>> --
>>>> 1.7.12.4
>>>>
>>>> _______________________________________________
>>>> U-Boot mailing list
>>>> U-Boot at lists.denx.de
>>>> http://lists.denx.de/mailman/listinfo/u-boot
>>>
>>>
>>>
>>
>> Thanks,
>> Minkyu Kang.
>>
applied to u-boot-samsung.
Thanks,
Minkyu Kang.
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