The SD clock could be generated by platform clock or peripheral clock for some platforms. This patch adds peripheral clock support for kernel for T1024/T1040/T2080. To enable it, define CONFIG_FSL_ESDHC_USE_PERIPHERAL_CLK.
Signed-off-by: Yangbo Lu yangbo.lu@freescale.com Cc: York Sun yorksun@freescale.com --- arch/powerpc/cpu/mpc85xx/speed.c | 49 ++++++++++++++++++++++++++++++- arch/powerpc/include/asm/config_mpc85xx.h | 10 +++++-- drivers/mmc/fsl_esdhc.c | 5 ++++ include/e500.h | 1 + 4 files changed, 62 insertions(+), 3 deletions(-)
diff --git a/arch/powerpc/cpu/mpc85xx/speed.c b/arch/powerpc/cpu/mpc85xx/speed.c index 7e69873..79202bb 100644 --- a/arch/powerpc/cpu/mpc85xx/speed.c +++ b/arch/powerpc/cpu/mpc85xx/speed.c @@ -69,7 +69,8 @@ void get_sys_info(sys_info_t *sys_info) [14] = 4, /* CC4 PPL / 4 */ }; uint i, freq_c_pll[CONFIG_SYS_FSL_NUM_CC_PLLS]; -#if !defined(CONFIG_FM_PLAT_CLK_DIV) || !defined(CONFIG_PME_PLAT_CLK_DIV) +#if !defined(CONFIG_FM_PLAT_CLK_DIV) || !defined(CONFIG_PME_PLAT_CLK_DIV) || \ + defined(CONFIG_FSL_ESDHC_USE_PERIPHERAL_CLK) uint rcw_tmp; #endif uint ratio[CONFIG_SYS_FSL_NUM_CC_PLLS]; @@ -313,6 +314,48 @@ void get_sys_info(sys_info_t *sys_info) #endif #endif
+#ifdef CONFIG_FSL_ESDHC_USE_PERIPHERAL_CLK +#if defined(CONFIG_PPC_T2080) +#define ESDHC_CLK_SEL 0x00000007 +#define ESDHC_CLK_SHIFT 0 +#define ESDHC_CLK_RCWSR 15 +#else /* Support T1040 T1024 by now */ +#define ESDHC_CLK_SEL 0xe0000000 +#define ESDHC_CLK_SHIFT 29 +#define ESDHC_CLK_RCWSR 7 +#endif + rcw_tmp = in_be32(&gur->rcwsr[ESDHC_CLK_RCWSR]); + switch ((rcw_tmp & ESDHC_CLK_SEL) >> ESDHC_CLK_SHIFT) { + case 1: + sys_info->freq_sdhc = freq_c_pll[CONFIG_SYS_SDHC_CLK]; + break; + case 2: + sys_info->freq_sdhc = freq_c_pll[CONFIG_SYS_SDHC_CLK] / 2; + break; + case 3: + sys_info->freq_sdhc = freq_c_pll[CONFIG_SYS_SDHC_CLK] / 3; + break; +#if defined(CONFIG_SYS_SDHC_CLK_2_PLL) + case 4: + sys_info->freq_sdhc = freq_c_pll[CONFIG_SYS_SDHC_CLK] / 4; + break; +#if defined(CONFIG_PPC_T2080) + case 5: + sys_info->freq_sdhc = freq_c_pll[1 - CONFIG_SYS_SDHC_CLK]; + break; +#endif + case 6: + sys_info->freq_sdhc = freq_c_pll[1 - CONFIG_SYS_SDHC_CLK] / 2; + break; + case 7: + sys_info->freq_sdhc = freq_c_pll[1 - CONFIG_SYS_SDHC_CLK] / 3; + break; +#endif + default: + sys_info->freq_sdhc = 0; + printf("Error: Unknown SDHC peripheral clock select!\n"); + } +#endif #else /* CONFIG_SYS_FSL_QORIQ_CHASSIS2 */
for_each_cpu(i, cpu, cpu_numcores(), cpu_mask()) { @@ -520,12 +563,16 @@ int get_clocks (void) gd->arch.i2c2_clk = gd->arch.i2c1_clk;
#if defined(CONFIG_FSL_ESDHC) +#ifdef CONFIG_FSL_ESDHC_USE_PERIPHERAL_CLK + gd->arch.sdhc_clk = sys_info.freq_sdhc / 2; +#else #if defined(CONFIG_MPC8569) || defined(CONFIG_P1010) ||\ defined(CONFIG_P1014) gd->arch.sdhc_clk = gd->bus_clk; #else gd->arch.sdhc_clk = gd->bus_clk / 2; #endif +#endif #endif /* defined(CONFIG_FSL_ESDHC) */
#if defined(CONFIG_CPM2) diff --git a/arch/powerpc/include/asm/config_mpc85xx.h b/arch/powerpc/include/asm/config_mpc85xx.h index 01b0905..24c593b 100644 --- a/arch/powerpc/include/asm/config_mpc85xx.h +++ b/arch/powerpc/include/asm/config_mpc85xx.h @@ -757,7 +757,6 @@ defined(CONFIG_PPC_T1020) || defined(CONFIG_PPC_T1022) #endif #define CONFIG_SYS_FSL_NUM_CC_PLLS 2 #define CONFIG_SYS_FSL_CLUSTER_CLOCKS { 1, 1, 1, 1 } -#define CONFIG_SYS_SDHC_CLOCK 0 #define CONFIG_SYS_FSL_NUM_LAWS 16 #define CONFIG_SYS_FSL_SRDS_1 #define CONFIG_SYS_FSL_SEC_COMPAT 5 @@ -773,6 +772,9 @@ defined(CONFIG_PPC_T1020) || defined(CONFIG_PPC_T1022) #define CONFIG_SYS_FMAN_V3 #define CONFIG_FM_PLAT_CLK_DIV 1 #define CONFIG_SYS_FM1_CLK CONFIG_FM_PLAT_CLK_DIV +#define CONFIG_SYS_SDHC_CLK 0/* Select SDHC CLK begining from PLL1 + per rcw field value */ +#define CONFIG_SYS_SDHC_CLK_2_PLL /* Select SDHC CLK from 2 PLLs */ #define CONFIG_SYS_FM_MURAM_SIZE 0x30000 #define CONFIG_SYS_FSL_SINGLE_SOURCE_CLK #define CONFIG_SYS_FSL_TBCLK_DIV 16 @@ -805,7 +807,6 @@ defined(CONFIG_PPC_T1014) || defined(CONFIG_PPC_T1013) #endif #define CONFIG_SYS_FSL_NUM_CC_PLL 2 #define CONFIG_SYS_FSL_CLUSTER_CLOCKS { 1, 1, 1, 1 } -#define CONFIG_SYS_SDHC_CLOCK 0 #define CONFIG_SYS_FSL_NUM_LAWS 16 #define CONFIG_SYS_FSL_SRDS_1 #define CONFIG_SYS_FSL_SEC_COMPAT 5 @@ -818,6 +819,8 @@ defined(CONFIG_PPC_T1014) || defined(CONFIG_PPC_T1013) #define CONFIG_SYS_FSL_DDR_VER FSL_DDR_VER_5_0 #define CONFIG_SYS_FSL_IFC_BANK_COUNT 8 #define CONFIG_SYS_FM1_CLK 0 +#define CONFIG_SYS_SDHC_CLK 0/* Select SDHC CLK begining from PLL1 + per rcw field value */ #define CONFIG_QBMAN_CLK_DIV 1 #define CONFIG_SYS_FM_MURAM_SIZE 0x30000 #define CONFIG_SYS_FSL_SINGLE_SOURCE_CLK @@ -865,6 +868,9 @@ defined(CONFIG_PPC_T1014) || defined(CONFIG_PPC_T1013) #define CONFIG_PME_PLAT_CLK_DIV 1 #define CONFIG_SYS_PME_CLK CONFIG_PME_PLAT_CLK_DIV #define CONFIG_SYS_FM1_CLK 0 +#define CONFIG_SYS_SDHC_CLK 1/* Select SDHC CLK begining from PLL2 + per rcw field value */ +#define CONFIG_SYS_SDHC_CLK_2_PLL /* Select SDHC CLK from 2 PLLs */ #define CONFIG_SYS_FSL_DDR_VER FSL_DDR_VER_4_7 #define CONFIG_SYS_FSL_IFC_BANK_COUNT 8 #define CONFIG_SYS_FMAN_V3 diff --git a/drivers/mmc/fsl_esdhc.c b/drivers/mmc/fsl_esdhc.c index 355cada..8dea365 100644 --- a/drivers/mmc/fsl_esdhc.c +++ b/drivers/mmc/fsl_esdhc.c @@ -689,8 +689,13 @@ void fdt_fixup_esdhc(void *blob, bd_t *bd) } #endif
+#ifdef CONFIG_FSL_ESDHC_USE_PERIPHERAL_CLK + do_fixup_by_compat_u32(blob, compat, "peripheral-frequency", + gd->arch.sdhc_clk, 1); +#else do_fixup_by_compat_u32(blob, compat, "clock-frequency", gd->arch.sdhc_clk, 1); +#endif #ifdef CONFIG_FSL_ESDHC_ADAPTER_IDENT do_fixup_by_compat_u32(blob, compat, "adapter-type", (u32)(gd->arch.sdhc_adapter), 1); diff --git a/include/e500.h b/include/e500.h index 5884a22..07d0ee8 100644 --- a/include/e500.h +++ b/include/e500.h @@ -15,6 +15,7 @@ typedef struct unsigned long freq_ddrbus; unsigned long freq_localbus; unsigned long freq_qe; + unsigned long freq_sdhc; #ifdef CONFIG_SYS_DPAA_FMAN unsigned long freq_fman[CONFIG_SYS_NUM_FMAN]; #endif