Re: [PATCH v3 6/9] mfd: intel-m10-bmc: Downscope SPI defines & prefix with M10BMC_SPI

From: Russ Weight
Date: Fri Dec 02 2022 - 12:30:09 EST

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On 12/2/22 08:28, Xu Yilun wrote:
> On 2022-12-02 at 12:08:38 +0200, Ilpo Järvinen wrote:
>> Move SPI based board definitions to per interface file from the global
>> header. This makes it harder to use them accidently in the
>> generic/interface agnostic code. Prefix the defines with M10BMC_SPI
> I'm not sure if the register layout is actually bound to the bus
> interface. My experience is the register layout is always decided by
> board type. Is it possible there will be a new SPI based board but
> has different register layout in future?
>
> So is M10BMC_SPI_XXX a good nam

There could be future devices, spi or pmci based, that require different
addresses for some of these values, and at that time we would need to
additional versions of some of these macros using different names.
Right now, spi and pmci are the primary differentiating factors. I'm not
sure how to improve on the naming. Do you have any suggestions?

- Russ

>
> The same concern for PMCI in patch #7.
>
> Thanks,
> Yilun
>
>> to make it more obvious these are related to SPI only.
>>
>> Some bitfield defs are also moved to intel-m10-bmc-core which seems
>> more appropriate for them.
>>
>> Reviewed-by: Russ Weight <russell.h.weight@xxxxxxxxx>
>> Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@xxxxxxxxxxxxxxx>
>> ---
>> drivers/mfd/intel-m10-bmc-core.c | 11 ++++
>> drivers/mfd/intel-m10-bmc-spi.c | 87 ++++++++++++++++++++++---------
>> include/linux/mfd/intel-m10-bmc.h | 46 ----------------
>> 3 files changed, 73 insertions(+), 71 deletions(-)
>>
>> diff --git a/drivers/mfd/intel-m10-bmc-core.c b/drivers/mfd/intel-m10-bmc-core.c
>> index 51b78b868235..50a4ec758bdb 100644
>> --- a/drivers/mfd/intel-m10-bmc-core.c
>> +++ b/drivers/mfd/intel-m10-bmc-core.c
>> @@ -12,6 +12,17 @@
>> #include <linux/mfd/intel-m10-bmc.h>
>> #include <linux/module.h>
>>
>> +/* Register fields of system registers */
>> +#define M10BMC_MAC_BYTE4 GENMASK(7, 0)
>> +#define M10BMC_MAC_BYTE3 GENMASK(15, 8)
>> +#define M10BMC_MAC_BYTE2 GENMASK(23, 16)
>> +#define M10BMC_MAC_BYTE1 GENMASK(31, 24)
>> +#define M10BMC_MAC_BYTE6 GENMASK(7, 0)
>> +#define M10BMC_MAC_BYTE5 GENMASK(15, 8)
>> +#define M10BMC_MAC_COUNT GENMASK(23, 16)
>> +#define M10BMC_VER_MAJOR_MSK GENMASK(23, 16)
>> +#define M10BMC_VER_PCB_INFO_MSK GENMASK(31, 24)
>> +
>> static ssize_t bmc_version_show(struct device *dev,
>> struct device_attribute *attr, char *buf)
>> {
>> diff --git a/drivers/mfd/intel-m10-bmc-spi.c b/drivers/mfd/intel-m10-bmc-spi.c
>> index 611a4ab42717..e99fe7c43314 100644
>> --- a/drivers/mfd/intel-m10-bmc-spi.c
>> +++ b/drivers/mfd/intel-m10-bmc-spi.c
>> @@ -13,10 +13,47 @@
>> #include <linux/regmap.h>
>> #include <linux/spi/spi.h>
>>
>> +#define M10BMC_SPI_LEGACY_BUILD_VER 0x300468
>> +#define M10BMC_SPI_SYS_BASE 0x300800
>> +#define M10BMC_SPI_SYS_END 0x300fff
>> +#define M10BMC_SPI_FLASH_BASE 0x10000000
>> +#define M10BMC_SPI_FLASH_END 0x1fffffff
>> +#define M10BMC_SPI_MEM_END M10BMC_SPI_FLASH_END
>> +
>> +/* Register offset of system registers */
>> +#define NIOS2_FW_VERSION 0x0
>> +#define M10BMC_SPI_MAC_LOW 0x10
>> +#define M10BMC_SPI_MAC_HIGH 0x14
>> +#define M10BMC_SPI_TEST_REG 0x3c
>> +#define M10BMC_SPI_BUILD_VER 0x68
>> +#define M10BMC_SPI_VER_LEGACY_INVALID 0xffffffff
>> +
>> +/* Secure update doorbell register, in system register region */
>> +#define M10BMC_SPI_DOORBELL 0x400
>> +
>> +/* Authorization Result register, in system register region */
>> +#define M10BMC_SPI_AUTH_RESULT 0x404
>> +
>> +/* Addresses for security related data in FLASH */
>> +#define M10BMC_SPI_BMC_REH_ADDR 0x17ffc004
>> +#define M10BMC_SPI_BMC_PROG_ADDR 0x17ffc000
>> +#define M10BMC_SPI_BMC_PROG_MAGIC 0x5746
>> +
>> +#define M10BMC_SPI_SR_REH_ADDR 0x17ffd004
>> +#define M10BMC_SPI_SR_PROG_ADDR 0x17ffd000
>> +#define M10BMC_SPI_SR_PROG_MAGIC 0x5253
>> +
>> +#define M10BMC_SPI_PR_REH_ADDR 0x17ffe004
>> +#define M10BMC_SPI_PR_PROG_ADDR 0x17ffe000
>> +#define M10BMC_SPI_PR_PROG_MAGIC 0x5250
>> +
>> +/* Address of 4KB inverted bit vector containing staging area FLASH count */
>> +#define M10BMC_SPI_STAGING_FLASH_COUNT 0x17ffb000
>> +
>> static const struct regmap_range m10bmc_regmap_range[] = {
>> - regmap_reg_range(M10BMC_LEGACY_BUILD_VER, M10BMC_LEGACY_BUILD_VER),
>> - regmap_reg_range(M10BMC_SYS_BASE, M10BMC_SYS_END),
>> - regmap_reg_range(M10BMC_FLASH_BASE, M10BMC_FLASH_END),
>> + regmap_reg_range(M10BMC_SPI_LEGACY_BUILD_VER, M10BMC_SPI_LEGACY_BUILD_VER),
>> + regmap_reg_range(M10BMC_SPI_SYS_BASE, M10BMC_SPI_SYS_END),
>> + regmap_reg_range(M10BMC_SPI_FLASH_BASE, M10BMC_SPI_FLASH_END),
>> };
>>
>> static const struct regmap_access_table m10bmc_access_table = {
>> @@ -30,7 +67,7 @@ static struct regmap_config intel_m10bmc_regmap_config = {
>> .reg_stride = 4,
>> .wr_table = &m10bmc_access_table,
>> .rd_table = &m10bmc_access_table,
>> - .max_register = M10BMC_MEM_END,
>> + .max_register = M10BMC_SPI_MEM_END,
>> };
>>
>> static int check_m10bmc_version(struct intel_m10bmc *ddata)
>> @@ -41,16 +78,16 @@ static int check_m10bmc_version(struct intel_m10bmc *ddata)
>> /*
>> * This check is to filter out the very old legacy BMC versions. In the
>> * old BMC chips, the BMC version info is stored in the old version
>> - * register (M10BMC_LEGACY_BUILD_VER), so its read out value would have
>> - * not been M10BMC_VER_LEGACY_INVALID (0xffffffff). But in new BMC
>> + * register (M10BMC_SPI_LEGACY_BUILD_VER), so its read out value would have
>> + * not been M10BMC_SPI_VER_LEGACY_INVALID (0xffffffff). But in new BMC
>> * chips that the driver supports, the value of this register should be
>> - * M10BMC_VER_LEGACY_INVALID.
>> + * M10BMC_SPI_VER_LEGACY_INVALID.
>> */
>> - ret = m10bmc_raw_read(ddata, M10BMC_LEGACY_BUILD_VER, &v);
>> + ret = m10bmc_raw_read(ddata, M10BMC_SPI_LEGACY_BUILD_VER, &v);
>> if (ret)
>> return -ENODEV;
>>
>> - if (v != M10BMC_VER_LEGACY_INVALID) {
>> + if (v != M10BMC_SPI_VER_LEGACY_INVALID) {
>> dev_err(ddata->dev, "bad version M10BMC detected\n");
>> return -ENODEV;
>> }
>> @@ -92,23 +129,23 @@ static int intel_m10_bmc_spi_probe(struct spi_device *spi)
>> }
>>
>> static const struct m10bmc_csr_map m10bmc_spi_csr_map = {
>> - .base = M10BMC_SYS_BASE,
>> - .build_version = M10BMC_BUILD_VER,
>> + .base = M10BMC_SPI_SYS_BASE,
>> + .build_version = M10BMC_SPI_BUILD_VER,
>> .fw_version = NIOS2_FW_VERSION,
>> - .mac_low = M10BMC_MAC_LOW,
>> - .mac_high = M10BMC_MAC_HIGH,
>> - .doorbell = M10BMC_DOORBELL,
>> - .auth_result = M10BMC_AUTH_RESULT,
>> - .bmc_prog_addr = BMC_PROG_ADDR,
>> - .bmc_reh_addr = BMC_REH_ADDR,
>> - .bmc_magic = BMC_PROG_MAGIC,
>> - .sr_prog_addr = SR_PROG_ADDR,
>> - .sr_reh_addr = SR_REH_ADDR,
>> - .sr_magic = SR_PROG_MAGIC,
>> - .pr_prog_addr = PR_PROG_ADDR,
>> - .pr_reh_addr = PR_REH_ADDR,
>> - .pr_magic = PR_PROG_MAGIC,
>> - .rsu_update_counter = STAGING_FLASH_COUNT,
>> + .mac_low = M10BMC_SPI_MAC_LOW,
>> + .mac_high = M10BMC_SPI_MAC_HIGH,
>> + .doorbell = M10BMC_SPI_DOORBELL,
>> + .auth_result = M10BMC_SPI_AUTH_RESULT,
>> + .bmc_prog_addr = M10BMC_SPI_BMC_PROG_ADDR,
>> + .bmc_reh_addr = M10BMC_SPI_BMC_REH_ADDR,
>> + .bmc_magic = M10BMC_SPI_BMC_PROG_MAGIC,
>> + .sr_prog_addr = M10BMC_SPI_SR_PROG_ADDR,
>> + .sr_reh_addr = M10BMC_SPI_SR_REH_ADDR,
>> + .sr_magic = M10BMC_SPI_SR_PROG_MAGIC,
>> + .pr_prog_addr = M10BMC_SPI_PR_PROG_ADDR,
>> + .pr_reh_addr = M10BMC_SPI_PR_REH_ADDR,
>> + .pr_magic = M10BMC_SPI_PR_PROG_MAGIC,
>> + .rsu_update_counter = M10BMC_SPI_STAGING_FLASH_COUNT,
>> };
>>
>> static struct mfd_cell m10bmc_d5005_subdevs[] = {
>> diff --git a/include/linux/mfd/intel-m10-bmc.h b/include/linux/mfd/intel-m10-bmc.h
>> index 91567375f1bf..71ace732bb48 100644
>> --- a/include/linux/mfd/intel-m10-bmc.h
>> +++ b/include/linux/mfd/intel-m10-bmc.h
>> @@ -9,39 +9,9 @@
>>
>> #include <linux/regmap.h>
>>
>> -#define M10BMC_LEGACY_BUILD_VER 0x300468
>> -#define M10BMC_SYS_BASE 0x300800
>> -#define M10BMC_SYS_END 0x300fff
>> -#define M10BMC_FLASH_BASE 0x10000000
>> -#define M10BMC_FLASH_END 0x1fffffff
>> -#define M10BMC_MEM_END M10BMC_FLASH_END
>> -
>> #define M10BMC_STAGING_BASE 0x18000000
>> #define M10BMC_STAGING_SIZE 0x3800000
>>
>> -/* Register offset of system registers */
>> -#define NIOS2_FW_VERSION 0x0
>> -#define M10BMC_MAC_LOW 0x10
>> -#define M10BMC_MAC_BYTE4 GENMASK(7, 0)
>> -#define M10BMC_MAC_BYTE3 GENMASK(15, 8)
>> -#define M10BMC_MAC_BYTE2 GENMASK(23, 16)
>> -#define M10BMC_MAC_BYTE1 GENMASK(31, 24)
>> -#define M10BMC_MAC_HIGH 0x14
>> -#define M10BMC_MAC_BYTE6 GENMASK(7, 0)
>> -#define M10BMC_MAC_BYTE5 GENMASK(15, 8)
>> -#define M10BMC_MAC_COUNT GENMASK(23, 16)
>> -#define M10BMC_TEST_REG 0x3c
>> -#define M10BMC_BUILD_VER 0x68
>> -#define M10BMC_VER_MAJOR_MSK GENMASK(23, 16)
>> -#define M10BMC_VER_PCB_INFO_MSK GENMASK(31, 24)
>> -#define M10BMC_VER_LEGACY_INVALID 0xffffffff
>> -
>> -/* Secure update doorbell register, in system register region */
>> -#define M10BMC_DOORBELL 0x400
>> -
>> -/* Authorization Result register, in system register region */
>> -#define M10BMC_AUTH_RESULT 0x404
>> -
>> /* Doorbell register fields */
>> #define DRBL_RSU_REQUEST BIT(0)
>> #define DRBL_RSU_PROGRESS GENMASK(7, 4)
>> @@ -102,22 +72,6 @@
>> #define RSU_COMPLETE_INTERVAL_MS 1000
>> #define RSU_COMPLETE_TIMEOUT_MS (40 * 60 * 1000)
>>
>> -/* Addresses for security related data in FLASH */
>> -#define BMC_REH_ADDR 0x17ffc004
>> -#define BMC_PROG_ADDR 0x17ffc000
>> -#define BMC_PROG_MAGIC 0x5746
>> -
>> -#define SR_REH_ADDR 0x17ffd004
>> -#define SR_PROG_ADDR 0x17ffd000
>> -#define SR_PROG_MAGIC 0x5253
>> -
>> -#define PR_REH_ADDR 0x17ffe004
>> -#define PR_PROG_ADDR 0x17ffe000
>> -#define PR_PROG_MAGIC 0x5250
>> -
>> -/* Address of 4KB inverted bit vector containing staging area FLASH count */
>> -#define STAGING_FLASH_COUNT 0x17ffb000
>> -
>> /**
>> * struct m10bmc_csr_map - Intel MAX 10 BMC CSR register map
>> */
>> --
>> 2.30.2
>>

Next message: Vijaya Krishna Nivarthi: "Re: [PATCH] dmaengine: qcom: gpi: Set link_rx bit on GO TRE for rx operation"
Previous message: Xu Yilun: "Re: [PATCH v3 7/9] mfd: intel-m10-bmc: Add PMCI driver"
In reply to: Xu Yilun: "Re: [PATCH v3 6/9] mfd: intel-m10-bmc: Downscope SPI defines & prefix with M10BMC_SPI"
Next in thread: Ilpo Järvinen: "Re: [PATCH v3 6/9] mfd: intel-m10-bmc: Downscope SPI defines & prefix with M10BMC_SPI"
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