^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0-only
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * Copyright (C) 2020 BAIKAL ELECTRONICS, JSC
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Authors:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) * Serge Semin <Sergey.Semin@baikalelectronics.ru>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) * Baikal-T1 AXI-bus driver
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/types.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/bitfield.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <linux/atomic.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <linux/regmap.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include <linux/platform_device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #include <linux/mfd/syscon.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #include <linux/interrupt.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) #include <linux/io.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) #include <linux/nmi.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) #include <linux/of.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) #include <linux/clk.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) #include <linux/reset.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) #include <linux/sysfs.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) #define BT1_AXI_WERRL 0x110
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) #define BT1_AXI_WERRH 0x114
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) #define BT1_AXI_WERRH_TYPE BIT(23)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) #define BT1_AXI_WERRH_ADDR_FLD 24
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) #define BT1_AXI_WERRH_ADDR_MASK GENMASK(31, BT1_AXI_WERRH_ADDR_FLD)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) * struct bt1_axi - Baikal-T1 AXI-bus private data
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) * @dev: Pointer to the device structure.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) * @qos_regs: AXI Interconnect QoS tuning registers.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) * @sys_regs: Baikal-T1 System Controller registers map.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) * @irq: Errors IRQ number.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) * @aclk: AXI reference clock.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) * @arst: AXI Interconnect reset line.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) * @count: Number of errors detected.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) struct bt1_axi {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) struct device *dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) void __iomem *qos_regs;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) struct regmap *sys_regs;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) int irq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) struct clk *aclk;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) struct reset_control *arst;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) atomic_t count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) static irqreturn_t bt1_axi_isr(int irq, void *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) struct bt1_axi *axi = data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) u32 low = 0, high = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) regmap_read(axi->sys_regs, BT1_AXI_WERRL, &low);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) regmap_read(axi->sys_regs, BT1_AXI_WERRH, &high);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) dev_crit_ratelimited(axi->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) "AXI-bus fault %d: %s at 0x%x%08x\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) atomic_inc_return(&axi->count),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) high & BT1_AXI_WERRH_TYPE ? "no slave" : "slave protocol error",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) high, low);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) * Print backtrace on each CPU. This might be pointless if the fault
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) * has happened on the same CPU as the IRQ handler is executed or
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) * the other core proceeded further execution despite the error.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) * But if it's not, by looking at the trace we would get straight to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) * the cause of the problem.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) trigger_all_cpu_backtrace();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) return IRQ_HANDLED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) static void bt1_axi_clear_data(void *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) struct bt1_axi *axi = data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) struct platform_device *pdev = to_platform_device(axi->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) platform_set_drvdata(pdev, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) static struct bt1_axi *bt1_axi_create_data(struct platform_device *pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) struct device *dev = &pdev->dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) struct bt1_axi *axi;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) axi = devm_kzalloc(dev, sizeof(*axi), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) if (!axi)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) return ERR_PTR(-ENOMEM);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) ret = devm_add_action(dev, bt1_axi_clear_data, axi);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) if (ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) dev_err(dev, "Can't add AXI EHB data clear action\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) return ERR_PTR(ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) axi->dev = dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) atomic_set(&axi->count, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) platform_set_drvdata(pdev, axi);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) return axi;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) static int bt1_axi_request_regs(struct bt1_axi *axi)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) struct platform_device *pdev = to_platform_device(axi->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) struct device *dev = axi->dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) axi->sys_regs = syscon_regmap_lookup_by_phandle(dev->of_node, "syscon");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) if (IS_ERR(axi->sys_regs)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) dev_err(dev, "Couldn't find syscon registers\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) return PTR_ERR(axi->sys_regs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) axi->qos_regs = devm_platform_ioremap_resource_byname(pdev, "qos");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) if (IS_ERR(axi->qos_regs))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) dev_err(dev, "Couldn't map AXI-bus QoS registers\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) return PTR_ERR_OR_ZERO(axi->qos_regs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) static int bt1_axi_request_rst(struct bt1_axi *axi)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) axi->arst = devm_reset_control_get_optional_exclusive(axi->dev, "arst");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) if (IS_ERR(axi->arst)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) dev_warn(axi->dev, "Couldn't get reset control line\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) return PTR_ERR(axi->arst);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) ret = reset_control_deassert(axi->arst);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) dev_err(axi->dev, "Failed to deassert the reset line\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) static void bt1_axi_disable_clk(void *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) struct bt1_axi *axi = data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) clk_disable_unprepare(axi->aclk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) static int bt1_axi_request_clk(struct bt1_axi *axi)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) axi->aclk = devm_clk_get(axi->dev, "aclk");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) if (IS_ERR(axi->aclk)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) dev_err(axi->dev, "Couldn't get AXI Interconnect clock\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) return PTR_ERR(axi->aclk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) ret = clk_prepare_enable(axi->aclk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) if (ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) dev_err(axi->dev, "Couldn't enable the AXI clock\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) ret = devm_add_action_or_reset(axi->dev, bt1_axi_disable_clk, axi);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) dev_err(axi->dev, "Can't add AXI clock disable action\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) static int bt1_axi_request_irq(struct bt1_axi *axi)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) struct platform_device *pdev = to_platform_device(axi->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) axi->irq = platform_get_irq(pdev, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) if (axi->irq < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) return axi->irq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) ret = devm_request_irq(axi->dev, axi->irq, bt1_axi_isr, IRQF_SHARED,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) "bt1-axi", axi);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) dev_err(axi->dev, "Couldn't request AXI EHB IRQ\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) static ssize_t count_show(struct device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) struct device_attribute *attr, char *buf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) struct bt1_axi *axi = dev_get_drvdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) return scnprintf(buf, PAGE_SIZE, "%d\n", atomic_read(&axi->count));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) static DEVICE_ATTR_RO(count);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) static ssize_t inject_error_show(struct device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) struct device_attribute *attr, char *buf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) return scnprintf(buf, PAGE_SIZE, "Error injection: bus unaligned\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) static ssize_t inject_error_store(struct device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) struct device_attribute *attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) const char *data, size_t count)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) struct bt1_axi *axi = dev_get_drvdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) * Performing unaligned read from the memory will cause the CM2 bus
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) * error while unaligned writing - the AXI bus write error handled
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) * by this driver.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) if (sysfs_streq(data, "bus"))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) readb(axi->qos_regs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) else if (sysfs_streq(data, "unaligned"))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) writeb(0, axi->qos_regs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) return count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) static DEVICE_ATTR_RW(inject_error);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) static struct attribute *bt1_axi_sysfs_attrs[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) &dev_attr_count.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) &dev_attr_inject_error.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) NULL
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) ATTRIBUTE_GROUPS(bt1_axi_sysfs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) static void bt1_axi_remove_sysfs(void *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) struct bt1_axi *axi = data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) device_remove_groups(axi->dev, bt1_axi_sysfs_groups);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) static int bt1_axi_init_sysfs(struct bt1_axi *axi)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) ret = device_add_groups(axi->dev, bt1_axi_sysfs_groups);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) if (ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) dev_err(axi->dev, "Failed to add sysfs files group\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) ret = devm_add_action_or_reset(axi->dev, bt1_axi_remove_sysfs, axi);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) dev_err(axi->dev, "Can't add AXI EHB sysfs remove action\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) static int bt1_axi_probe(struct platform_device *pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) struct bt1_axi *axi;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) axi = bt1_axi_create_data(pdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) if (IS_ERR(axi))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) return PTR_ERR(axi);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) ret = bt1_axi_request_regs(axi);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) ret = bt1_axi_request_rst(axi);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) ret = bt1_axi_request_clk(axi);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) ret = bt1_axi_request_irq(axi);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) ret = bt1_axi_init_sysfs(axi);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) static const struct of_device_id bt1_axi_of_match[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) { .compatible = "baikal,bt1-axi" },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) { }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) MODULE_DEVICE_TABLE(of, bt1_axi_of_match);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) static struct platform_driver bt1_axi_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) .probe = bt1_axi_probe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) .driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) .name = "bt1-axi",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) .of_match_table = bt1_axi_of_match
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) module_platform_driver(bt1_axi_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) MODULE_AUTHOR("Serge Semin <Sergey.Semin@baikalelectronics.ru>");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) MODULE_DESCRIPTION("Baikal-T1 AXI-bus driver");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) MODULE_LICENSE("GPL v2");
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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