diff options
author | Tom Rini <trini@konsulko.com> | 2023-10-04 10:49:30 -0400 |
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committer | Tom Rini <trini@konsulko.com> | 2023-10-04 10:49:30 -0400 |
commit | b83e2858667dfaf2fb67331d0f45a2c39179ef91 (patch) | |
tree | 36046c483cf01bc35ae38ae474b57c985ead6b44 /drivers/rng/stm32mp1_rng.c | |
parent | 65b9b3462bec2966911658836983819ab4e4823e (diff) | |
parent | 6d91f0a3a14dd13a04946e672a4640fc65e4d275 (diff) |
Merge tag 'u-boot-stm32-20231004' of https://source.denx.de/u-boot/custodians/u-boot-stm
STM32 MCU:
_ alignment with kernel DT v6.5 for stm32f429 and stm32f746
_ rework way of displaying ST logo for stm32f746-disco and stm32f769-disco
STM32 MPU:
_ alignment with kernel DT v6.6-rc1
_ add RNG support for stm32mp13
_ add USB, USB boot and stm32prog command support for stm32mp13
_ add support of USART1 clock for stm32mp1
_ only print RAM and board code with SPL_DISPLAY_PRINT flag for
stm32mp1
_ rename update_sf to dh_update_sd_to_sf and add dh_update_sd_to_emmc
for stm32mp15xx DHCOR
[ Fix merge conflict at board/st/common/stm32mp_dfu.c ]
Signed-off-by: Tom Rini <trini@konsulko.com>
Diffstat (limited to 'drivers/rng/stm32mp1_rng.c')
-rw-r--r-- | drivers/rng/stm32mp1_rng.c | 198 |
1 files changed, 0 insertions, 198 deletions
diff --git a/drivers/rng/stm32mp1_rng.c b/drivers/rng/stm32mp1_rng.c deleted file mode 100644 index 89da78c6c8b..00000000000 --- a/drivers/rng/stm32mp1_rng.c +++ /dev/null @@ -1,198 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0-or-later -/* - * Copyright (c) 2019, Linaro Limited - */ - -#define LOG_CATEGORY UCLASS_RNG - -#include <common.h> -#include <clk.h> -#include <dm.h> -#include <log.h> -#include <reset.h> -#include <rng.h> -#include <linux/bitops.h> -#include <linux/delay.h> - -#include <asm/io.h> -#include <linux/iopoll.h> -#include <linux/kernel.h> - -#define RNG_CR 0x00 -#define RNG_CR_RNGEN BIT(2) -#define RNG_CR_CED BIT(5) -#define RNG_CR_CONDRST BIT(30) - -#define RNG_SR 0x04 -#define RNG_SR_SEIS BIT(6) -#define RNG_SR_CEIS BIT(5) -#define RNG_SR_SECS BIT(2) -#define RNG_SR_DRDY BIT(0) - -#define RNG_DR 0x08 - -struct stm32_rng_data { - bool has_cond_reset; -}; - -struct stm32_rng_plat { - fdt_addr_t base; - struct clk clk; - struct reset_ctl rst; - const struct stm32_rng_data *data; -}; - -static int stm32_rng_read(struct udevice *dev, void *data, size_t len) -{ - int retval, i; - u32 sr, count, reg; - size_t increment; - struct stm32_rng_plat *pdata = dev_get_plat(dev); - - while (len > 0) { - retval = readl_poll_timeout(pdata->base + RNG_SR, sr, - sr & RNG_SR_DRDY, 10000); - if (retval) - return retval; - - if (sr & (RNG_SR_SEIS | RNG_SR_SECS)) { - /* As per SoC TRM */ - clrbits_le32(pdata->base + RNG_SR, RNG_SR_SEIS); - for (i = 0; i < 12; i++) - readl(pdata->base + RNG_DR); - if (readl(pdata->base + RNG_SR) & RNG_SR_SEIS) { - log_err("RNG Noise"); - return -EIO; - } - /* start again */ - continue; - } - - /* - * Once the DRDY bit is set, the RNG_DR register can - * be read four consecutive times. - */ - count = 4; - while (len && count) { - reg = readl(pdata->base + RNG_DR); - memcpy(data, ®, min(len, sizeof(u32))); - increment = min(len, sizeof(u32)); - data += increment; - len -= increment; - count--; - } - } - - return 0; -} - -static int stm32_rng_init(struct stm32_rng_plat *pdata) -{ - int err; - u32 cr, sr; - - err = clk_enable(&pdata->clk); - if (err) - return err; - - cr = readl(pdata->base + RNG_CR); - - /* Disable CED */ - cr |= RNG_CR_CED; - if (pdata->data->has_cond_reset) { - cr |= RNG_CR_CONDRST; - writel(cr, pdata->base + RNG_CR); - cr &= ~RNG_CR_CONDRST; - writel(cr, pdata->base + RNG_CR); - err = readl_poll_timeout(pdata->base + RNG_CR, cr, - (!(cr & RNG_CR_CONDRST)), 10000); - if (err) - return err; - } - - /* clear error indicators */ - writel(0, pdata->base + RNG_SR); - - cr |= RNG_CR_RNGEN; - writel(cr, pdata->base + RNG_CR); - - err = readl_poll_timeout(pdata->base + RNG_SR, sr, - sr & RNG_SR_DRDY, 10000); - return err; -} - -static int stm32_rng_cleanup(struct stm32_rng_plat *pdata) -{ - writel(0, pdata->base + RNG_CR); - - return clk_disable(&pdata->clk); -} - -static int stm32_rng_probe(struct udevice *dev) -{ - struct stm32_rng_plat *pdata = dev_get_plat(dev); - - pdata->data = (struct stm32_rng_data *)dev_get_driver_data(dev); - - reset_assert(&pdata->rst); - udelay(20); - reset_deassert(&pdata->rst); - - return stm32_rng_init(pdata); -} - -static int stm32_rng_remove(struct udevice *dev) -{ - struct stm32_rng_plat *pdata = dev_get_plat(dev); - - return stm32_rng_cleanup(pdata); -} - -static int stm32_rng_of_to_plat(struct udevice *dev) -{ - struct stm32_rng_plat *pdata = dev_get_plat(dev); - int err; - - pdata->base = dev_read_addr(dev); - if (!pdata->base) - return -ENOMEM; - - err = clk_get_by_index(dev, 0, &pdata->clk); - if (err) - return err; - - err = reset_get_by_index(dev, 0, &pdata->rst); - if (err) - return err; - - return 0; -} - -static const struct dm_rng_ops stm32_rng_ops = { - .read = stm32_rng_read, -}; - -static const struct stm32_rng_data stm32mp13_rng_data = { - .has_cond_reset = true, -}; - -static const struct stm32_rng_data stm32_rng_data = { - .has_cond_reset = false, -}; - -static const struct udevice_id stm32_rng_match[] = { - {.compatible = "st,stm32mp13-rng", .data = (ulong)&stm32mp13_rng_data}, - {.compatible = "st,stm32-rng", .data = (ulong)&stm32_rng_data}, - {}, -}; - -U_BOOT_DRIVER(stm32_rng) = { - .name = "stm32-rng", - .id = UCLASS_RNG, - .of_match = stm32_rng_match, - .ops = &stm32_rng_ops, - .probe = stm32_rng_probe, - .remove = stm32_rng_remove, - .plat_auto = sizeof(struct stm32_rng_plat), - .of_to_plat = stm32_rng_of_to_plat, -}; |