diff options
Diffstat (limited to 'drivers/misc/imx8ulp/imx8ulp_mu.c')
| -rw-r--r-- | drivers/misc/imx8ulp/imx8ulp_mu.c | 234 |
1 files changed, 0 insertions, 234 deletions
diff --git a/drivers/misc/imx8ulp/imx8ulp_mu.c b/drivers/misc/imx8ulp/imx8ulp_mu.c deleted file mode 100644 index 333ebdf576..0000000000 --- a/drivers/misc/imx8ulp/imx8ulp_mu.c +++ /dev/null @@ -1,234 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0 -/* - * Copyright 2020 NXP - */ - -#include <common.h> -#include <asm/io.h> -#include <dm.h> -#include <dm/lists.h> -#include <dm/root.h> -#include <dm/device-internal.h> -#include <asm/arch/s400_api.h> -#include <asm/arch/imx-regs.h> -#include <linux/iopoll.h> -#include <misc.h> - -DECLARE_GLOBAL_DATA_PTR; - -struct imx8ulp_mu { - struct mu_type *base; -}; - -#define MU_SR_TE0_MASK BIT(0) -#define MU_SR_RF0_MASK BIT(0) -#define MU_TR_COUNT 4 -#define MU_RR_COUNT 4 - -void mu_hal_init(ulong base) -{ - struct mu_type *mu_base = (struct mu_type *)base; - - writel(0, &mu_base->tcr); - writel(0, &mu_base->rcr); -} - -int mu_hal_sendmsg(ulong base, u32 reg_index, u32 msg) -{ - struct mu_type *mu_base = (struct mu_type *)base; - u32 mask = MU_SR_TE0_MASK << reg_index; - u32 val; - int ret; - - assert(reg_index < MU_TR_COUNT); - - debug("sendmsg sr 0x%x\n", readl(&mu_base->sr)); - - /* Wait TX register to be empty. */ - ret = readl_poll_timeout(&mu_base->tsr, val, val & mask, 10000); - if (ret < 0) { - debug("%s timeout\n", __func__); - return -ETIMEDOUT; - } - - debug("tr[%d] 0x%x\n", reg_index, msg); - - writel(msg, &mu_base->tr[reg_index]); - - return 0; -} - -int mu_hal_receivemsg(ulong base, u32 reg_index, u32 *msg) -{ - struct mu_type *mu_base = (struct mu_type *)base; - u32 mask = MU_SR_RF0_MASK << reg_index; - u32 val; - int ret; - - assert(reg_index < MU_TR_COUNT); - - debug("receivemsg sr 0x%x\n", readl(&mu_base->sr)); - - /* Wait RX register to be full. */ - ret = readl_poll_timeout(&mu_base->rsr, val, val & mask, 10000); - if (ret < 0) { - debug("%s timeout\n", __func__); - return -ETIMEDOUT; - } - - *msg = readl(&mu_base->rr[reg_index]); - - debug("rr[%d] 0x%x\n", reg_index, *msg); - - return 0; -} - -static int imx8ulp_mu_read(struct mu_type *base, void *data) -{ - struct imx8ulp_s400_msg *msg = (struct imx8ulp_s400_msg *)data; - int ret; - u8 count = 0; - - if (!msg) - return -EINVAL; - - /* Read first word */ - ret = mu_hal_receivemsg((ulong)base, 0, (u32 *)msg); - if (ret) - return ret; - count++; - - /* Check size */ - if (msg->size > S400_MAX_MSG) { - *((u32 *)msg) = 0; - return -EINVAL; - } - - /* Read remaining words */ - while (count < msg->size) { - ret = mu_hal_receivemsg((ulong)base, count % MU_RR_COUNT, - &msg->data[count - 1]); - if (ret) - return ret; - count++; - } - - return 0; -} - -static int imx8ulp_mu_write(struct mu_type *base, void *data) -{ - struct imx8ulp_s400_msg *msg = (struct imx8ulp_s400_msg *)data; - int ret; - u8 count = 0; - - if (!msg) - return -EINVAL; - - /* Check size */ - if (msg->size > S400_MAX_MSG) - return -EINVAL; - - /* Write first word */ - ret = mu_hal_sendmsg((ulong)base, 0, *((u32 *)msg)); - if (ret) - return ret; - count++; - - /* Write remaining words */ - while (count < msg->size) { - ret = mu_hal_sendmsg((ulong)base, count % MU_TR_COUNT, - msg->data[count - 1]); - if (ret) - return ret; - count++; - } - - return 0; -} - -/* - * Note the function prototype use msgid as the 2nd parameter, here - * we take it as no_resp. - */ -static int imx8ulp_mu_call(struct udevice *dev, int no_resp, void *tx_msg, - int tx_size, void *rx_msg, int rx_size) -{ - struct imx8ulp_mu *priv = dev_get_priv(dev); - u32 result; - int ret; - - /* Expect tx_msg, rx_msg are the same value */ - if (rx_msg && tx_msg != rx_msg) - printf("tx_msg %p, rx_msg %p\n", tx_msg, rx_msg); - - ret = imx8ulp_mu_write(priv->base, tx_msg); - if (ret) - return ret; - if (!no_resp) { - ret = imx8ulp_mu_read(priv->base, rx_msg); - if (ret) - return ret; - } - - result = ((struct imx8ulp_s400_msg *)rx_msg)->data[0]; - if ((result & 0xff) == 0xd6) - return 0; - - return -EIO; -} - -static int imx8ulp_mu_probe(struct udevice *dev) -{ - struct imx8ulp_mu *priv = dev_get_priv(dev); - fdt_addr_t addr; - - debug("%s(dev=%p) (priv=%p)\n", __func__, dev, priv); - - addr = devfdt_get_addr(dev); - if (addr == FDT_ADDR_T_NONE) - return -EINVAL; - - priv->base = (struct mu_type *)addr; - - debug("mu base 0x%lx\n", (ulong)priv->base); - - /* U-Boot not enable interrupts, so need to enable RX interrupts */ - mu_hal_init((ulong)priv->base); - - gd->arch.s400_dev = dev; - - return 0; -} - -static int imx8ulp_mu_remove(struct udevice *dev) -{ - return 0; -} - -static int imx8ulp_mu_bind(struct udevice *dev) -{ - debug("%s(dev=%p)\n", __func__, dev); - - return 0; -} - -static struct misc_ops imx8ulp_mu_ops = { - .call = imx8ulp_mu_call, -}; - -static const struct udevice_id imx8ulp_mu_ids[] = { - { .compatible = "fsl,imx8ulp-mu" }, - { } -}; - -U_BOOT_DRIVER(imx8ulp_mu) = { - .name = "imx8ulp_mu", - .id = UCLASS_MISC, - .of_match = imx8ulp_mu_ids, - .probe = imx8ulp_mu_probe, - .bind = imx8ulp_mu_bind, - .remove = imx8ulp_mu_remove, - .ops = &imx8ulp_mu_ops, - .priv_auto = sizeof(struct imx8ulp_mu), -}; |