Gilad Avidov | d0c6ae4 | 2015-03-25 11:37:32 -0600 | [diff] [blame] | 1 | /* |
Abhijeet Dharmapurikar | ea64f7f | 2016-01-18 22:00:33 -0800 | [diff] [blame] | 2 | * Copyright (c) 2012-2016, The Linux Foundation. All rights reserved. |
Kenneth Heitke | 39ae93e | 2014-02-12 13:44:24 -0600 | [diff] [blame] | 3 | * |
| 4 | * This program is free software; you can redistribute it and/or modify |
| 5 | * it under the terms of the GNU General Public License version 2 and |
| 6 | * only version 2 as published by the Free Software Foundation. |
| 7 | * |
| 8 | * This program is distributed in the hope that it will be useful, |
| 9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 11 | * GNU General Public License for more details. |
| 12 | */ |
Stephen Boyd | 987a9f1 | 2015-11-17 16:13:55 -0800 | [diff] [blame] | 13 | #include <linux/bitmap.h> |
Kenneth Heitke | 39ae93e | 2014-02-12 13:44:24 -0600 | [diff] [blame] | 14 | #include <linux/delay.h> |
| 15 | #include <linux/err.h> |
| 16 | #include <linux/interrupt.h> |
| 17 | #include <linux/io.h> |
Josh Cartwright | 67b563f | 2014-02-12 13:44:25 -0600 | [diff] [blame] | 18 | #include <linux/irqchip/chained_irq.h> |
| 19 | #include <linux/irqdomain.h> |
| 20 | #include <linux/irq.h> |
Kenneth Heitke | 39ae93e | 2014-02-12 13:44:24 -0600 | [diff] [blame] | 21 | #include <linux/kernel.h> |
| 22 | #include <linux/module.h> |
| 23 | #include <linux/of.h> |
| 24 | #include <linux/platform_device.h> |
| 25 | #include <linux/slab.h> |
| 26 | #include <linux/spmi.h> |
| 27 | |
| 28 | /* PMIC Arbiter configuration registers */ |
| 29 | #define PMIC_ARB_VERSION 0x0000 |
Gilad Avidov | d0c6ae4 | 2015-03-25 11:37:32 -0600 | [diff] [blame] | 30 | #define PMIC_ARB_VERSION_V2_MIN 0x20010000 |
Kenneth Heitke | 39ae93e | 2014-02-12 13:44:24 -0600 | [diff] [blame] | 31 | #define PMIC_ARB_INT_EN 0x0004 |
| 32 | |
Gilad Avidov | d0c6ae4 | 2015-03-25 11:37:32 -0600 | [diff] [blame] | 33 | /* PMIC Arbiter channel registers offsets */ |
| 34 | #define PMIC_ARB_CMD 0x00 |
| 35 | #define PMIC_ARB_CONFIG 0x04 |
| 36 | #define PMIC_ARB_STATUS 0x08 |
| 37 | #define PMIC_ARB_WDATA0 0x10 |
| 38 | #define PMIC_ARB_WDATA1 0x14 |
| 39 | #define PMIC_ARB_RDATA0 0x18 |
| 40 | #define PMIC_ARB_RDATA1 0x1C |
| 41 | #define PMIC_ARB_REG_CHNL(N) (0x800 + 0x4 * (N)) |
Kenneth Heitke | 39ae93e | 2014-02-12 13:44:24 -0600 | [diff] [blame] | 42 | |
| 43 | /* Mapping Table */ |
| 44 | #define SPMI_MAPPING_TABLE_REG(N) (0x0B00 + (4 * (N))) |
| 45 | #define SPMI_MAPPING_BIT_INDEX(X) (((X) >> 18) & 0xF) |
| 46 | #define SPMI_MAPPING_BIT_IS_0_FLAG(X) (((X) >> 17) & 0x1) |
| 47 | #define SPMI_MAPPING_BIT_IS_0_RESULT(X) (((X) >> 9) & 0xFF) |
| 48 | #define SPMI_MAPPING_BIT_IS_1_FLAG(X) (((X) >> 8) & 0x1) |
| 49 | #define SPMI_MAPPING_BIT_IS_1_RESULT(X) (((X) >> 0) & 0xFF) |
| 50 | |
Kenneth Heitke | 39ae93e | 2014-02-12 13:44:24 -0600 | [diff] [blame] | 51 | #define SPMI_MAPPING_TABLE_TREE_DEPTH 16 /* Maximum of 16-bits */ |
Stephen Boyd | 987a9f1 | 2015-11-17 16:13:55 -0800 | [diff] [blame] | 52 | #define PMIC_ARB_MAX_PPID BIT(12) /* PPID is 12bit */ |
| 53 | #define PMIC_ARB_CHAN_VALID BIT(15) |
Kenneth Heitke | 39ae93e | 2014-02-12 13:44:24 -0600 | [diff] [blame] | 54 | |
| 55 | /* Ownership Table */ |
| 56 | #define SPMI_OWNERSHIP_TABLE_REG(N) (0x0700 + (4 * (N))) |
| 57 | #define SPMI_OWNERSHIP_PERIPH2OWNER(X) ((X) & 0x7) |
| 58 | |
| 59 | /* Channel Status fields */ |
| 60 | enum pmic_arb_chnl_status { |
Abhijeet Dharmapurikar | 469f2c3 | 2016-01-05 16:52:38 -0800 | [diff] [blame] | 61 | PMIC_ARB_STATUS_DONE = BIT(0), |
| 62 | PMIC_ARB_STATUS_FAILURE = BIT(1), |
| 63 | PMIC_ARB_STATUS_DENIED = BIT(2), |
| 64 | PMIC_ARB_STATUS_DROPPED = BIT(3), |
Kenneth Heitke | 39ae93e | 2014-02-12 13:44:24 -0600 | [diff] [blame] | 65 | }; |
| 66 | |
| 67 | /* Command register fields */ |
| 68 | #define PMIC_ARB_CMD_MAX_BYTE_COUNT 8 |
| 69 | |
| 70 | /* Command Opcodes */ |
| 71 | enum pmic_arb_cmd_op_code { |
| 72 | PMIC_ARB_OP_EXT_WRITEL = 0, |
| 73 | PMIC_ARB_OP_EXT_READL = 1, |
| 74 | PMIC_ARB_OP_EXT_WRITE = 2, |
| 75 | PMIC_ARB_OP_RESET = 3, |
| 76 | PMIC_ARB_OP_SLEEP = 4, |
| 77 | PMIC_ARB_OP_SHUTDOWN = 5, |
| 78 | PMIC_ARB_OP_WAKEUP = 6, |
| 79 | PMIC_ARB_OP_AUTHENTICATE = 7, |
| 80 | PMIC_ARB_OP_MSTR_READ = 8, |
| 81 | PMIC_ARB_OP_MSTR_WRITE = 9, |
| 82 | PMIC_ARB_OP_EXT_READ = 13, |
| 83 | PMIC_ARB_OP_WRITE = 14, |
| 84 | PMIC_ARB_OP_READ = 15, |
| 85 | PMIC_ARB_OP_ZERO_WRITE = 16, |
| 86 | }; |
| 87 | |
| 88 | /* Maximum number of support PMIC peripherals */ |
Stephen Boyd | 987a9f1 | 2015-11-17 16:13:55 -0800 | [diff] [blame] | 89 | #define PMIC_ARB_MAX_PERIPHS 512 |
Kenneth Heitke | 39ae93e | 2014-02-12 13:44:24 -0600 | [diff] [blame] | 90 | #define PMIC_ARB_TIMEOUT_US 100 |
| 91 | #define PMIC_ARB_MAX_TRANS_BYTES (8) |
| 92 | |
| 93 | #define PMIC_ARB_APID_MASK 0xFF |
| 94 | #define PMIC_ARB_PPID_MASK 0xFFF |
| 95 | |
| 96 | /* interrupt enable bit */ |
| 97 | #define SPMI_PIC_ACC_ENABLE_BIT BIT(0) |
| 98 | |
Gilad Avidov | d0c6ae4 | 2015-03-25 11:37:32 -0600 | [diff] [blame] | 99 | struct pmic_arb_ver_ops; |
| 100 | |
Kenneth Heitke | 39ae93e | 2014-02-12 13:44:24 -0600 | [diff] [blame] | 101 | /** |
Abhijeet Dharmapurikar | fbcfb7e | 2016-01-08 12:45:20 -0800 | [diff] [blame] | 102 | * spmi_pmic_arb - SPMI PMIC Arbiter object |
Kenneth Heitke | 39ae93e | 2014-02-12 13:44:24 -0600 | [diff] [blame] | 103 | * |
Gilad Avidov | d0c6ae4 | 2015-03-25 11:37:32 -0600 | [diff] [blame] | 104 | * @rd_base: on v1 "core", on v2 "observer" register base off DT. |
| 105 | * @wr_base: on v1 "core", on v2 "chnls" register base off DT. |
Kenneth Heitke | 39ae93e | 2014-02-12 13:44:24 -0600 | [diff] [blame] | 106 | * @intr: address of the SPMI interrupt control registers. |
| 107 | * @cnfg: address of the PMIC Arbiter configuration registers. |
| 108 | * @lock: lock to synchronize accesses. |
Gilad Avidov | d0c6ae4 | 2015-03-25 11:37:32 -0600 | [diff] [blame] | 109 | * @channel: execution environment channel to use for accesses. |
Josh Cartwright | 67b563f | 2014-02-12 13:44:25 -0600 | [diff] [blame] | 110 | * @irq: PMIC ARB interrupt. |
| 111 | * @ee: the current Execution Environment |
| 112 | * @min_apid: minimum APID (used for bounding IRQ search) |
| 113 | * @max_apid: maximum APID |
Abhijeet Dharmapurikar | ea64f7f | 2016-01-18 22:00:33 -0800 | [diff] [blame] | 114 | * @max_periph: maximum number of PMIC peripherals supported by HW. |
Josh Cartwright | 67b563f | 2014-02-12 13:44:25 -0600 | [diff] [blame] | 115 | * @mapping_table: in-memory copy of PPID -> APID mapping table. |
| 116 | * @domain: irq domain object for PMIC IRQ domain |
| 117 | * @spmic: SPMI controller object |
Gilad Avidov | d0c6ae4 | 2015-03-25 11:37:32 -0600 | [diff] [blame] | 118 | * @apid_to_ppid: in-memory copy of APID -> PPID mapping table. |
| 119 | * @ver_ops: version dependent operations. |
Abhijeet Dharmapurikar | 39155b6 | 2016-01-06 19:55:21 -0800 | [diff] [blame] | 120 | * @ppid_to_apid in-memory copy of PPID -> channel (APID) mapping table. |
Gilad Avidov | d0c6ae4 | 2015-03-25 11:37:32 -0600 | [diff] [blame] | 121 | * v2 only. |
Kenneth Heitke | 39ae93e | 2014-02-12 13:44:24 -0600 | [diff] [blame] | 122 | */ |
Abhijeet Dharmapurikar | fbcfb7e | 2016-01-08 12:45:20 -0800 | [diff] [blame] | 123 | struct spmi_pmic_arb { |
Gilad Avidov | d0c6ae4 | 2015-03-25 11:37:32 -0600 | [diff] [blame] | 124 | void __iomem *rd_base; |
| 125 | void __iomem *wr_base; |
Kenneth Heitke | 39ae93e | 2014-02-12 13:44:24 -0600 | [diff] [blame] | 126 | void __iomem *intr; |
| 127 | void __iomem *cnfg; |
Stephen Boyd | 987a9f1 | 2015-11-17 16:13:55 -0800 | [diff] [blame] | 128 | void __iomem *core; |
| 129 | resource_size_t core_size; |
Kenneth Heitke | 39ae93e | 2014-02-12 13:44:24 -0600 | [diff] [blame] | 130 | raw_spinlock_t lock; |
| 131 | u8 channel; |
Josh Cartwright | 67b563f | 2014-02-12 13:44:25 -0600 | [diff] [blame] | 132 | int irq; |
| 133 | u8 ee; |
Stephen Boyd | 987a9f1 | 2015-11-17 16:13:55 -0800 | [diff] [blame] | 134 | u16 min_apid; |
| 135 | u16 max_apid; |
Abhijeet Dharmapurikar | ea64f7f | 2016-01-18 22:00:33 -0800 | [diff] [blame] | 136 | u16 max_periph; |
Stephen Boyd | 987a9f1 | 2015-11-17 16:13:55 -0800 | [diff] [blame] | 137 | u32 *mapping_table; |
| 138 | DECLARE_BITMAP(mapping_table_valid, PMIC_ARB_MAX_PERIPHS); |
Josh Cartwright | 67b563f | 2014-02-12 13:44:25 -0600 | [diff] [blame] | 139 | struct irq_domain *domain; |
| 140 | struct spmi_controller *spmic; |
Stephen Boyd | 987a9f1 | 2015-11-17 16:13:55 -0800 | [diff] [blame] | 141 | u16 *apid_to_ppid; |
Gilad Avidov | d0c6ae4 | 2015-03-25 11:37:32 -0600 | [diff] [blame] | 142 | const struct pmic_arb_ver_ops *ver_ops; |
Abhijeet Dharmapurikar | 39155b6 | 2016-01-06 19:55:21 -0800 | [diff] [blame] | 143 | u16 *ppid_to_apid; |
| 144 | u16 last_apid; |
| 145 | u8 *apid_to_owner; |
Gilad Avidov | d0c6ae4 | 2015-03-25 11:37:32 -0600 | [diff] [blame] | 146 | }; |
| 147 | |
| 148 | /** |
| 149 | * pmic_arb_ver: version dependent functionality. |
| 150 | * |
Abhijeet Dharmapurikar | ea64f7f | 2016-01-18 22:00:33 -0800 | [diff] [blame] | 151 | * @mode: access rights to specified pmic peripheral. |
Gilad Avidov | d0c6ae4 | 2015-03-25 11:37:32 -0600 | [diff] [blame] | 152 | * @non_data_cmd: on v1 issues an spmi non-data command. |
| 153 | * on v2 no HW support, returns -EOPNOTSUPP. |
| 154 | * @offset: on v1 offset of per-ee channel. |
| 155 | * on v2 offset of per-ee and per-ppid channel. |
| 156 | * @fmt_cmd: formats a GENI/SPMI command. |
| 157 | * @owner_acc_status: on v1 offset of PMIC_ARB_SPMI_PIC_OWNERm_ACC_STATUSn |
| 158 | * on v2 offset of SPMI_PIC_OWNERm_ACC_STATUSn. |
| 159 | * @acc_enable: on v1 offset of PMIC_ARB_SPMI_PIC_ACC_ENABLEn |
| 160 | * on v2 offset of SPMI_PIC_ACC_ENABLEn. |
| 161 | * @irq_status: on v1 offset of PMIC_ARB_SPMI_PIC_IRQ_STATUSn |
| 162 | * on v2 offset of SPMI_PIC_IRQ_STATUSn. |
| 163 | * @irq_clear: on v1 offset of PMIC_ARB_SPMI_PIC_IRQ_CLEARn |
| 164 | * on v2 offset of SPMI_PIC_IRQ_CLEARn. |
| 165 | */ |
| 166 | struct pmic_arb_ver_ops { |
Abhijeet Dharmapurikar | 6e9eb38 | 2016-01-08 12:50:24 -0800 | [diff] [blame^] | 167 | int (*ppid_to_apid)(struct spmi_pmic_arb *pa, u8 sid, u16 addr, |
| 168 | u8 *apid); |
Abhijeet Dharmapurikar | fbcfb7e | 2016-01-08 12:45:20 -0800 | [diff] [blame] | 169 | int (*mode)(struct spmi_pmic_arb *dev, u8 sid, u16 addr, |
Abhijeet Dharmapurikar | ea64f7f | 2016-01-18 22:00:33 -0800 | [diff] [blame] | 170 | mode_t *mode); |
Gilad Avidov | d0c6ae4 | 2015-03-25 11:37:32 -0600 | [diff] [blame] | 171 | /* spmi commands (read_cmd, write_cmd, cmd) functionality */ |
Abhijeet Dharmapurikar | fbcfb7e | 2016-01-08 12:45:20 -0800 | [diff] [blame] | 172 | int (*offset)(struct spmi_pmic_arb *dev, u8 sid, u16 addr, |
Stephen Boyd | 987a9f1 | 2015-11-17 16:13:55 -0800 | [diff] [blame] | 173 | u32 *offset); |
Gilad Avidov | d0c6ae4 | 2015-03-25 11:37:32 -0600 | [diff] [blame] | 174 | u32 (*fmt_cmd)(u8 opc, u8 sid, u16 addr, u8 bc); |
| 175 | int (*non_data_cmd)(struct spmi_controller *ctrl, u8 opc, u8 sid); |
| 176 | /* Interrupts controller functionality (offset of PIC registers) */ |
| 177 | u32 (*owner_acc_status)(u8 m, u8 n); |
| 178 | u32 (*acc_enable)(u8 n); |
| 179 | u32 (*irq_status)(u8 n); |
| 180 | u32 (*irq_clear)(u8 n); |
Kenneth Heitke | 39ae93e | 2014-02-12 13:44:24 -0600 | [diff] [blame] | 181 | }; |
| 182 | |
Abhijeet Dharmapurikar | fbcfb7e | 2016-01-08 12:45:20 -0800 | [diff] [blame] | 183 | static inline void pmic_arb_base_write(struct spmi_pmic_arb *pa, |
Kenneth Heitke | 39ae93e | 2014-02-12 13:44:24 -0600 | [diff] [blame] | 184 | u32 offset, u32 val) |
| 185 | { |
Abhijeet Dharmapurikar | fbcfb7e | 2016-01-08 12:45:20 -0800 | [diff] [blame] | 186 | writel_relaxed(val, pa->wr_base + offset); |
Gilad Avidov | d0c6ae4 | 2015-03-25 11:37:32 -0600 | [diff] [blame] | 187 | } |
| 188 | |
Abhijeet Dharmapurikar | fbcfb7e | 2016-01-08 12:45:20 -0800 | [diff] [blame] | 189 | static inline void pmic_arb_set_rd_cmd(struct spmi_pmic_arb *pa, |
Gilad Avidov | d0c6ae4 | 2015-03-25 11:37:32 -0600 | [diff] [blame] | 190 | u32 offset, u32 val) |
| 191 | { |
Abhijeet Dharmapurikar | fbcfb7e | 2016-01-08 12:45:20 -0800 | [diff] [blame] | 192 | writel_relaxed(val, pa->rd_base + offset); |
Kenneth Heitke | 39ae93e | 2014-02-12 13:44:24 -0600 | [diff] [blame] | 193 | } |
| 194 | |
| 195 | /** |
| 196 | * pa_read_data: reads pmic-arb's register and copy 1..4 bytes to buf |
| 197 | * @bc: byte count -1. range: 0..3 |
| 198 | * @reg: register's address |
| 199 | * @buf: output parameter, length must be bc + 1 |
| 200 | */ |
Abhijeet Dharmapurikar | fbcfb7e | 2016-01-08 12:45:20 -0800 | [diff] [blame] | 201 | static void pa_read_data(struct spmi_pmic_arb *pa, u8 *buf, u32 reg, u8 bc) |
Kenneth Heitke | 39ae93e | 2014-02-12 13:44:24 -0600 | [diff] [blame] | 202 | { |
Abhijeet Dharmapurikar | fbcfb7e | 2016-01-08 12:45:20 -0800 | [diff] [blame] | 203 | u32 data = __raw_readl(pa->rd_base + reg); |
| 204 | |
Kenneth Heitke | 39ae93e | 2014-02-12 13:44:24 -0600 | [diff] [blame] | 205 | memcpy(buf, &data, (bc & 3) + 1); |
| 206 | } |
| 207 | |
| 208 | /** |
| 209 | * pa_write_data: write 1..4 bytes from buf to pmic-arb's register |
| 210 | * @bc: byte-count -1. range: 0..3. |
| 211 | * @reg: register's address. |
| 212 | * @buf: buffer to write. length must be bc + 1. |
| 213 | */ |
| 214 | static void |
Abhijeet Dharmapurikar | fbcfb7e | 2016-01-08 12:45:20 -0800 | [diff] [blame] | 215 | pa_write_data(struct spmi_pmic_arb *pa, const u8 *buf, u32 reg, u8 bc) |
Kenneth Heitke | 39ae93e | 2014-02-12 13:44:24 -0600 | [diff] [blame] | 216 | { |
| 217 | u32 data = 0; |
Abhijeet Dharmapurikar | fbcfb7e | 2016-01-08 12:45:20 -0800 | [diff] [blame] | 218 | |
Kenneth Heitke | 39ae93e | 2014-02-12 13:44:24 -0600 | [diff] [blame] | 219 | memcpy(&data, buf, (bc & 3) + 1); |
Abhijeet Dharmapurikar | fbcfb7e | 2016-01-08 12:45:20 -0800 | [diff] [blame] | 220 | pmic_arb_base_write(pa, reg, data); |
Kenneth Heitke | 39ae93e | 2014-02-12 13:44:24 -0600 | [diff] [blame] | 221 | } |
| 222 | |
Gilad Avidov | d0c6ae4 | 2015-03-25 11:37:32 -0600 | [diff] [blame] | 223 | static int pmic_arb_wait_for_done(struct spmi_controller *ctrl, |
| 224 | void __iomem *base, u8 sid, u16 addr) |
Kenneth Heitke | 39ae93e | 2014-02-12 13:44:24 -0600 | [diff] [blame] | 225 | { |
Abhijeet Dharmapurikar | fbcfb7e | 2016-01-08 12:45:20 -0800 | [diff] [blame] | 226 | struct spmi_pmic_arb *pa = spmi_controller_get_drvdata(ctrl); |
Kenneth Heitke | 39ae93e | 2014-02-12 13:44:24 -0600 | [diff] [blame] | 227 | u32 status = 0; |
| 228 | u32 timeout = PMIC_ARB_TIMEOUT_US; |
Stephen Boyd | 987a9f1 | 2015-11-17 16:13:55 -0800 | [diff] [blame] | 229 | u32 offset; |
| 230 | int rc; |
| 231 | |
Abhijeet Dharmapurikar | fbcfb7e | 2016-01-08 12:45:20 -0800 | [diff] [blame] | 232 | rc = pa->ver_ops->offset(pa, sid, addr, &offset); |
Stephen Boyd | 987a9f1 | 2015-11-17 16:13:55 -0800 | [diff] [blame] | 233 | if (rc) |
| 234 | return rc; |
| 235 | |
| 236 | offset += PMIC_ARB_STATUS; |
Kenneth Heitke | 39ae93e | 2014-02-12 13:44:24 -0600 | [diff] [blame] | 237 | |
| 238 | while (timeout--) { |
Gilad Avidov | d0c6ae4 | 2015-03-25 11:37:32 -0600 | [diff] [blame] | 239 | status = readl_relaxed(base + offset); |
Kenneth Heitke | 39ae93e | 2014-02-12 13:44:24 -0600 | [diff] [blame] | 240 | |
| 241 | if (status & PMIC_ARB_STATUS_DONE) { |
| 242 | if (status & PMIC_ARB_STATUS_DENIED) { |
| 243 | dev_err(&ctrl->dev, |
| 244 | "%s: transaction denied (0x%x)\n", |
| 245 | __func__, status); |
| 246 | return -EPERM; |
| 247 | } |
| 248 | |
| 249 | if (status & PMIC_ARB_STATUS_FAILURE) { |
| 250 | dev_err(&ctrl->dev, |
| 251 | "%s: transaction failed (0x%x)\n", |
| 252 | __func__, status); |
| 253 | return -EIO; |
| 254 | } |
| 255 | |
| 256 | if (status & PMIC_ARB_STATUS_DROPPED) { |
| 257 | dev_err(&ctrl->dev, |
| 258 | "%s: transaction dropped (0x%x)\n", |
| 259 | __func__, status); |
| 260 | return -EIO; |
| 261 | } |
| 262 | |
| 263 | return 0; |
| 264 | } |
| 265 | udelay(1); |
| 266 | } |
| 267 | |
| 268 | dev_err(&ctrl->dev, |
| 269 | "%s: timeout, status 0x%x\n", |
| 270 | __func__, status); |
| 271 | return -ETIMEDOUT; |
| 272 | } |
| 273 | |
Gilad Avidov | d0c6ae4 | 2015-03-25 11:37:32 -0600 | [diff] [blame] | 274 | static int |
| 275 | pmic_arb_non_data_cmd_v1(struct spmi_controller *ctrl, u8 opc, u8 sid) |
Kenneth Heitke | 39ae93e | 2014-02-12 13:44:24 -0600 | [diff] [blame] | 276 | { |
Abhijeet Dharmapurikar | fbcfb7e | 2016-01-08 12:45:20 -0800 | [diff] [blame] | 277 | struct spmi_pmic_arb *pa = spmi_controller_get_drvdata(ctrl); |
Kenneth Heitke | 39ae93e | 2014-02-12 13:44:24 -0600 | [diff] [blame] | 278 | unsigned long flags; |
| 279 | u32 cmd; |
| 280 | int rc; |
Stephen Boyd | 987a9f1 | 2015-11-17 16:13:55 -0800 | [diff] [blame] | 281 | u32 offset; |
| 282 | |
Abhijeet Dharmapurikar | fbcfb7e | 2016-01-08 12:45:20 -0800 | [diff] [blame] | 283 | rc = pa->ver_ops->offset(pa, sid, 0, &offset); |
Stephen Boyd | 987a9f1 | 2015-11-17 16:13:55 -0800 | [diff] [blame] | 284 | if (rc) |
| 285 | return rc; |
Gilad Avidov | d0c6ae4 | 2015-03-25 11:37:32 -0600 | [diff] [blame] | 286 | |
| 287 | cmd = ((opc | 0x40) << 27) | ((sid & 0xf) << 20); |
| 288 | |
Abhijeet Dharmapurikar | fbcfb7e | 2016-01-08 12:45:20 -0800 | [diff] [blame] | 289 | raw_spin_lock_irqsave(&pa->lock, flags); |
| 290 | pmic_arb_base_write(pa, offset + PMIC_ARB_CMD, cmd); |
| 291 | rc = pmic_arb_wait_for_done(ctrl, pa->wr_base, sid, 0); |
| 292 | raw_spin_unlock_irqrestore(&pa->lock, flags); |
Gilad Avidov | d0c6ae4 | 2015-03-25 11:37:32 -0600 | [diff] [blame] | 293 | |
| 294 | return rc; |
| 295 | } |
| 296 | |
| 297 | static int |
| 298 | pmic_arb_non_data_cmd_v2(struct spmi_controller *ctrl, u8 opc, u8 sid) |
| 299 | { |
| 300 | return -EOPNOTSUPP; |
| 301 | } |
| 302 | |
| 303 | /* Non-data command */ |
| 304 | static int pmic_arb_cmd(struct spmi_controller *ctrl, u8 opc, u8 sid) |
| 305 | { |
Abhijeet Dharmapurikar | fbcfb7e | 2016-01-08 12:45:20 -0800 | [diff] [blame] | 306 | struct spmi_pmic_arb *pa = spmi_controller_get_drvdata(ctrl); |
Gilad Avidov | d0c6ae4 | 2015-03-25 11:37:32 -0600 | [diff] [blame] | 307 | |
| 308 | dev_dbg(&ctrl->dev, "cmd op:0x%x sid:%d\n", opc, sid); |
Kenneth Heitke | 39ae93e | 2014-02-12 13:44:24 -0600 | [diff] [blame] | 309 | |
| 310 | /* Check for valid non-data command */ |
| 311 | if (opc < SPMI_CMD_RESET || opc > SPMI_CMD_WAKEUP) |
| 312 | return -EINVAL; |
| 313 | |
Abhijeet Dharmapurikar | fbcfb7e | 2016-01-08 12:45:20 -0800 | [diff] [blame] | 314 | return pa->ver_ops->non_data_cmd(ctrl, opc, sid); |
Kenneth Heitke | 39ae93e | 2014-02-12 13:44:24 -0600 | [diff] [blame] | 315 | } |
| 316 | |
| 317 | static int pmic_arb_read_cmd(struct spmi_controller *ctrl, u8 opc, u8 sid, |
| 318 | u16 addr, u8 *buf, size_t len) |
| 319 | { |
Abhijeet Dharmapurikar | fbcfb7e | 2016-01-08 12:45:20 -0800 | [diff] [blame] | 320 | struct spmi_pmic_arb *pa = spmi_controller_get_drvdata(ctrl); |
Kenneth Heitke | 39ae93e | 2014-02-12 13:44:24 -0600 | [diff] [blame] | 321 | unsigned long flags; |
| 322 | u8 bc = len - 1; |
| 323 | u32 cmd; |
| 324 | int rc; |
Stephen Boyd | 987a9f1 | 2015-11-17 16:13:55 -0800 | [diff] [blame] | 325 | u32 offset; |
Abhijeet Dharmapurikar | ea64f7f | 2016-01-18 22:00:33 -0800 | [diff] [blame] | 326 | mode_t mode; |
Stephen Boyd | 987a9f1 | 2015-11-17 16:13:55 -0800 | [diff] [blame] | 327 | |
Abhijeet Dharmapurikar | fbcfb7e | 2016-01-08 12:45:20 -0800 | [diff] [blame] | 328 | rc = pa->ver_ops->offset(pa, sid, addr, &offset); |
Stephen Boyd | 987a9f1 | 2015-11-17 16:13:55 -0800 | [diff] [blame] | 329 | if (rc) |
| 330 | return rc; |
Kenneth Heitke | 39ae93e | 2014-02-12 13:44:24 -0600 | [diff] [blame] | 331 | |
Abhijeet Dharmapurikar | fbcfb7e | 2016-01-08 12:45:20 -0800 | [diff] [blame] | 332 | rc = pa->ver_ops->mode(pa, sid, addr, &mode); |
Abhijeet Dharmapurikar | ea64f7f | 2016-01-18 22:00:33 -0800 | [diff] [blame] | 333 | if (rc) |
| 334 | return rc; |
| 335 | |
| 336 | if (!(mode & 0400)) { |
Abhijeet Dharmapurikar | fbcfb7e | 2016-01-08 12:45:20 -0800 | [diff] [blame] | 337 | dev_err(&pa->spmic->dev, |
Abhijeet Dharmapurikar | ea64f7f | 2016-01-18 22:00:33 -0800 | [diff] [blame] | 338 | "error: impermissible read from peripheral sid:%d addr:0x%x\n", |
| 339 | sid, addr); |
| 340 | return -ENODEV; |
| 341 | } |
| 342 | |
Kenneth Heitke | 39ae93e | 2014-02-12 13:44:24 -0600 | [diff] [blame] | 343 | if (bc >= PMIC_ARB_MAX_TRANS_BYTES) { |
| 344 | dev_err(&ctrl->dev, |
Gilad Avidov | d0c6ae4 | 2015-03-25 11:37:32 -0600 | [diff] [blame] | 345 | "pmic-arb supports 1..%d bytes per trans, but:%zu requested", |
Kenneth Heitke | 39ae93e | 2014-02-12 13:44:24 -0600 | [diff] [blame] | 346 | PMIC_ARB_MAX_TRANS_BYTES, len); |
| 347 | return -EINVAL; |
| 348 | } |
| 349 | |
| 350 | /* Check the opcode */ |
| 351 | if (opc >= 0x60 && opc <= 0x7F) |
| 352 | opc = PMIC_ARB_OP_READ; |
| 353 | else if (opc >= 0x20 && opc <= 0x2F) |
| 354 | opc = PMIC_ARB_OP_EXT_READ; |
| 355 | else if (opc >= 0x38 && opc <= 0x3F) |
| 356 | opc = PMIC_ARB_OP_EXT_READL; |
| 357 | else |
| 358 | return -EINVAL; |
| 359 | |
Abhijeet Dharmapurikar | fbcfb7e | 2016-01-08 12:45:20 -0800 | [diff] [blame] | 360 | cmd = pa->ver_ops->fmt_cmd(opc, sid, addr, bc); |
Kenneth Heitke | 39ae93e | 2014-02-12 13:44:24 -0600 | [diff] [blame] | 361 | |
Abhijeet Dharmapurikar | fbcfb7e | 2016-01-08 12:45:20 -0800 | [diff] [blame] | 362 | raw_spin_lock_irqsave(&pa->lock, flags); |
| 363 | pmic_arb_set_rd_cmd(pa, offset + PMIC_ARB_CMD, cmd); |
| 364 | rc = pmic_arb_wait_for_done(ctrl, pa->rd_base, sid, addr); |
Kenneth Heitke | 39ae93e | 2014-02-12 13:44:24 -0600 | [diff] [blame] | 365 | if (rc) |
| 366 | goto done; |
| 367 | |
Abhijeet Dharmapurikar | fbcfb7e | 2016-01-08 12:45:20 -0800 | [diff] [blame] | 368 | pa_read_data(pa, buf, offset + PMIC_ARB_RDATA0, |
Kenneth Heitke | 39ae93e | 2014-02-12 13:44:24 -0600 | [diff] [blame] | 369 | min_t(u8, bc, 3)); |
| 370 | |
| 371 | if (bc > 3) |
Abhijeet Dharmapurikar | fbcfb7e | 2016-01-08 12:45:20 -0800 | [diff] [blame] | 372 | pa_read_data(pa, buf + 4, offset + PMIC_ARB_RDATA1, bc - 4); |
Kenneth Heitke | 39ae93e | 2014-02-12 13:44:24 -0600 | [diff] [blame] | 373 | |
| 374 | done: |
Abhijeet Dharmapurikar | fbcfb7e | 2016-01-08 12:45:20 -0800 | [diff] [blame] | 375 | raw_spin_unlock_irqrestore(&pa->lock, flags); |
Kenneth Heitke | 39ae93e | 2014-02-12 13:44:24 -0600 | [diff] [blame] | 376 | return rc; |
| 377 | } |
| 378 | |
| 379 | static int pmic_arb_write_cmd(struct spmi_controller *ctrl, u8 opc, u8 sid, |
| 380 | u16 addr, const u8 *buf, size_t len) |
| 381 | { |
Abhijeet Dharmapurikar | fbcfb7e | 2016-01-08 12:45:20 -0800 | [diff] [blame] | 382 | struct spmi_pmic_arb *pa = spmi_controller_get_drvdata(ctrl); |
Kenneth Heitke | 39ae93e | 2014-02-12 13:44:24 -0600 | [diff] [blame] | 383 | unsigned long flags; |
| 384 | u8 bc = len - 1; |
| 385 | u32 cmd; |
| 386 | int rc; |
Stephen Boyd | 987a9f1 | 2015-11-17 16:13:55 -0800 | [diff] [blame] | 387 | u32 offset; |
Abhijeet Dharmapurikar | ea64f7f | 2016-01-18 22:00:33 -0800 | [diff] [blame] | 388 | mode_t mode; |
Stephen Boyd | 987a9f1 | 2015-11-17 16:13:55 -0800 | [diff] [blame] | 389 | |
Abhijeet Dharmapurikar | fbcfb7e | 2016-01-08 12:45:20 -0800 | [diff] [blame] | 390 | rc = pa->ver_ops->offset(pa, sid, addr, &offset); |
Stephen Boyd | 987a9f1 | 2015-11-17 16:13:55 -0800 | [diff] [blame] | 391 | if (rc) |
| 392 | return rc; |
Kenneth Heitke | 39ae93e | 2014-02-12 13:44:24 -0600 | [diff] [blame] | 393 | |
Abhijeet Dharmapurikar | fbcfb7e | 2016-01-08 12:45:20 -0800 | [diff] [blame] | 394 | rc = pa->ver_ops->mode(pa, sid, addr, &mode); |
Abhijeet Dharmapurikar | ea64f7f | 2016-01-18 22:00:33 -0800 | [diff] [blame] | 395 | if (rc) |
| 396 | return rc; |
| 397 | |
| 398 | if (!(mode & 0200)) { |
Abhijeet Dharmapurikar | fbcfb7e | 2016-01-08 12:45:20 -0800 | [diff] [blame] | 399 | dev_err(&pa->spmic->dev, |
Abhijeet Dharmapurikar | ea64f7f | 2016-01-18 22:00:33 -0800 | [diff] [blame] | 400 | "error: impermissible write to peripheral sid:%d addr:0x%x\n", |
| 401 | sid, addr); |
| 402 | return -ENODEV; |
| 403 | } |
| 404 | |
Kenneth Heitke | 39ae93e | 2014-02-12 13:44:24 -0600 | [diff] [blame] | 405 | if (bc >= PMIC_ARB_MAX_TRANS_BYTES) { |
| 406 | dev_err(&ctrl->dev, |
Gilad Avidov | d0c6ae4 | 2015-03-25 11:37:32 -0600 | [diff] [blame] | 407 | "pmic-arb supports 1..%d bytes per trans, but:%zu requested", |
Kenneth Heitke | 39ae93e | 2014-02-12 13:44:24 -0600 | [diff] [blame] | 408 | PMIC_ARB_MAX_TRANS_BYTES, len); |
| 409 | return -EINVAL; |
| 410 | } |
| 411 | |
| 412 | /* Check the opcode */ |
| 413 | if (opc >= 0x40 && opc <= 0x5F) |
| 414 | opc = PMIC_ARB_OP_WRITE; |
| 415 | else if (opc >= 0x00 && opc <= 0x0F) |
| 416 | opc = PMIC_ARB_OP_EXT_WRITE; |
| 417 | else if (opc >= 0x30 && opc <= 0x37) |
| 418 | opc = PMIC_ARB_OP_EXT_WRITEL; |
Stephen Boyd | 9b76968 | 2015-08-28 12:31:10 -0700 | [diff] [blame] | 419 | else if (opc >= 0x80) |
Kenneth Heitke | 39ae93e | 2014-02-12 13:44:24 -0600 | [diff] [blame] | 420 | opc = PMIC_ARB_OP_ZERO_WRITE; |
| 421 | else |
| 422 | return -EINVAL; |
| 423 | |
Abhijeet Dharmapurikar | fbcfb7e | 2016-01-08 12:45:20 -0800 | [diff] [blame] | 424 | cmd = pa->ver_ops->fmt_cmd(opc, sid, addr, bc); |
Kenneth Heitke | 39ae93e | 2014-02-12 13:44:24 -0600 | [diff] [blame] | 425 | |
| 426 | /* Write data to FIFOs */ |
Abhijeet Dharmapurikar | fbcfb7e | 2016-01-08 12:45:20 -0800 | [diff] [blame] | 427 | raw_spin_lock_irqsave(&pa->lock, flags); |
| 428 | pa_write_data(pa, buf, offset + PMIC_ARB_WDATA0, min_t(u8, bc, 3)); |
Kenneth Heitke | 39ae93e | 2014-02-12 13:44:24 -0600 | [diff] [blame] | 429 | if (bc > 3) |
Abhijeet Dharmapurikar | fbcfb7e | 2016-01-08 12:45:20 -0800 | [diff] [blame] | 430 | pa_write_data(pa, buf + 4, offset + PMIC_ARB_WDATA1, bc - 4); |
Kenneth Heitke | 39ae93e | 2014-02-12 13:44:24 -0600 | [diff] [blame] | 431 | |
| 432 | /* Start the transaction */ |
Abhijeet Dharmapurikar | fbcfb7e | 2016-01-08 12:45:20 -0800 | [diff] [blame] | 433 | pmic_arb_base_write(pa, offset + PMIC_ARB_CMD, cmd); |
| 434 | rc = pmic_arb_wait_for_done(ctrl, pa->wr_base, sid, addr); |
| 435 | raw_spin_unlock_irqrestore(&pa->lock, flags); |
Kenneth Heitke | 39ae93e | 2014-02-12 13:44:24 -0600 | [diff] [blame] | 436 | |
| 437 | return rc; |
| 438 | } |
| 439 | |
Josh Cartwright | 67b563f | 2014-02-12 13:44:25 -0600 | [diff] [blame] | 440 | enum qpnpint_regs { |
| 441 | QPNPINT_REG_RT_STS = 0x10, |
| 442 | QPNPINT_REG_SET_TYPE = 0x11, |
| 443 | QPNPINT_REG_POLARITY_HIGH = 0x12, |
| 444 | QPNPINT_REG_POLARITY_LOW = 0x13, |
| 445 | QPNPINT_REG_LATCHED_CLR = 0x14, |
| 446 | QPNPINT_REG_EN_SET = 0x15, |
| 447 | QPNPINT_REG_EN_CLR = 0x16, |
| 448 | QPNPINT_REG_LATCHED_STS = 0x18, |
| 449 | }; |
| 450 | |
| 451 | struct spmi_pmic_arb_qpnpint_type { |
| 452 | u8 type; /* 1 -> edge */ |
| 453 | u8 polarity_high; |
| 454 | u8 polarity_low; |
| 455 | } __packed; |
| 456 | |
| 457 | /* Simplified accessor functions for irqchip callbacks */ |
| 458 | static void qpnpint_spmi_write(struct irq_data *d, u8 reg, void *buf, |
| 459 | size_t len) |
| 460 | { |
Abhijeet Dharmapurikar | fbcfb7e | 2016-01-08 12:45:20 -0800 | [diff] [blame] | 461 | struct spmi_pmic_arb *pa = irq_data_get_irq_chip_data(d); |
Josh Cartwright | 67b563f | 2014-02-12 13:44:25 -0600 | [diff] [blame] | 462 | u8 sid = d->hwirq >> 24; |
| 463 | u8 per = d->hwirq >> 16; |
| 464 | |
| 465 | if (pmic_arb_write_cmd(pa->spmic, SPMI_CMD_EXT_WRITEL, sid, |
| 466 | (per << 8) + reg, buf, len)) |
| 467 | dev_err_ratelimited(&pa->spmic->dev, |
| 468 | "failed irqchip transaction on %x\n", |
| 469 | d->irq); |
| 470 | } |
| 471 | |
| 472 | static void qpnpint_spmi_read(struct irq_data *d, u8 reg, void *buf, size_t len) |
| 473 | { |
Abhijeet Dharmapurikar | fbcfb7e | 2016-01-08 12:45:20 -0800 | [diff] [blame] | 474 | struct spmi_pmic_arb *pa = irq_data_get_irq_chip_data(d); |
Josh Cartwright | 67b563f | 2014-02-12 13:44:25 -0600 | [diff] [blame] | 475 | u8 sid = d->hwirq >> 24; |
| 476 | u8 per = d->hwirq >> 16; |
| 477 | |
| 478 | if (pmic_arb_read_cmd(pa->spmic, SPMI_CMD_EXT_READL, sid, |
| 479 | (per << 8) + reg, buf, len)) |
| 480 | dev_err_ratelimited(&pa->spmic->dev, |
| 481 | "failed irqchip transaction on %x\n", |
| 482 | d->irq); |
| 483 | } |
| 484 | |
Abhijeet Dharmapurikar | fbcfb7e | 2016-01-08 12:45:20 -0800 | [diff] [blame] | 485 | static void periph_interrupt(struct spmi_pmic_arb *pa, u8 apid) |
Josh Cartwright | 67b563f | 2014-02-12 13:44:25 -0600 | [diff] [blame] | 486 | { |
| 487 | unsigned int irq; |
| 488 | u32 status; |
| 489 | int id; |
| 490 | |
Gilad Avidov | d0c6ae4 | 2015-03-25 11:37:32 -0600 | [diff] [blame] | 491 | status = readl_relaxed(pa->intr + pa->ver_ops->irq_status(apid)); |
Josh Cartwright | 67b563f | 2014-02-12 13:44:25 -0600 | [diff] [blame] | 492 | while (status) { |
| 493 | id = ffs(status) - 1; |
Abhijeet Dharmapurikar | 469f2c3 | 2016-01-05 16:52:38 -0800 | [diff] [blame] | 494 | status &= ~BIT(id); |
Josh Cartwright | 67b563f | 2014-02-12 13:44:25 -0600 | [diff] [blame] | 495 | irq = irq_find_mapping(pa->domain, |
| 496 | pa->apid_to_ppid[apid] << 16 |
| 497 | | id << 8 |
| 498 | | apid); |
| 499 | generic_handle_irq(irq); |
| 500 | } |
| 501 | } |
| 502 | |
Thomas Gleixner | bd0b9ac | 2015-09-14 10:42:37 +0200 | [diff] [blame] | 503 | static void pmic_arb_chained_irq(struct irq_desc *desc) |
Josh Cartwright | 67b563f | 2014-02-12 13:44:25 -0600 | [diff] [blame] | 504 | { |
Abhijeet Dharmapurikar | fbcfb7e | 2016-01-08 12:45:20 -0800 | [diff] [blame] | 505 | struct spmi_pmic_arb *pa = irq_desc_get_handler_data(desc); |
Jiang Liu | 7fe88f3 | 2015-07-13 20:52:25 +0000 | [diff] [blame] | 506 | struct irq_chip *chip = irq_desc_get_chip(desc); |
Josh Cartwright | 67b563f | 2014-02-12 13:44:25 -0600 | [diff] [blame] | 507 | void __iomem *intr = pa->intr; |
| 508 | int first = pa->min_apid >> 5; |
| 509 | int last = pa->max_apid >> 5; |
| 510 | u32 status; |
| 511 | int i, id; |
| 512 | |
| 513 | chained_irq_enter(chip, desc); |
| 514 | |
| 515 | for (i = first; i <= last; ++i) { |
| 516 | status = readl_relaxed(intr + |
Gilad Avidov | d0c6ae4 | 2015-03-25 11:37:32 -0600 | [diff] [blame] | 517 | pa->ver_ops->owner_acc_status(pa->ee, i)); |
Josh Cartwright | 67b563f | 2014-02-12 13:44:25 -0600 | [diff] [blame] | 518 | while (status) { |
| 519 | id = ffs(status) - 1; |
Abhijeet Dharmapurikar | 469f2c3 | 2016-01-05 16:52:38 -0800 | [diff] [blame] | 520 | status &= ~BIT(id); |
Josh Cartwright | 67b563f | 2014-02-12 13:44:25 -0600 | [diff] [blame] | 521 | periph_interrupt(pa, id + i * 32); |
| 522 | } |
| 523 | } |
| 524 | |
| 525 | chained_irq_exit(chip, desc); |
| 526 | } |
| 527 | |
| 528 | static void qpnpint_irq_ack(struct irq_data *d) |
| 529 | { |
Abhijeet Dharmapurikar | fbcfb7e | 2016-01-08 12:45:20 -0800 | [diff] [blame] | 530 | struct spmi_pmic_arb *pa = irq_data_get_irq_chip_data(d); |
Josh Cartwright | 67b563f | 2014-02-12 13:44:25 -0600 | [diff] [blame] | 531 | u8 irq = d->hwirq >> 8; |
| 532 | u8 apid = d->hwirq; |
| 533 | unsigned long flags; |
| 534 | u8 data; |
| 535 | |
| 536 | raw_spin_lock_irqsave(&pa->lock, flags); |
Abhijeet Dharmapurikar | 469f2c3 | 2016-01-05 16:52:38 -0800 | [diff] [blame] | 537 | writel_relaxed(BIT(irq), pa->intr + pa->ver_ops->irq_clear(apid)); |
Josh Cartwright | 67b563f | 2014-02-12 13:44:25 -0600 | [diff] [blame] | 538 | raw_spin_unlock_irqrestore(&pa->lock, flags); |
| 539 | |
Abhijeet Dharmapurikar | 469f2c3 | 2016-01-05 16:52:38 -0800 | [diff] [blame] | 540 | data = BIT(irq); |
Josh Cartwright | 67b563f | 2014-02-12 13:44:25 -0600 | [diff] [blame] | 541 | qpnpint_spmi_write(d, QPNPINT_REG_LATCHED_CLR, &data, 1); |
| 542 | } |
| 543 | |
| 544 | static void qpnpint_irq_mask(struct irq_data *d) |
| 545 | { |
Abhijeet Dharmapurikar | fbcfb7e | 2016-01-08 12:45:20 -0800 | [diff] [blame] | 546 | struct spmi_pmic_arb *pa = irq_data_get_irq_chip_data(d); |
Josh Cartwright | 67b563f | 2014-02-12 13:44:25 -0600 | [diff] [blame] | 547 | u8 irq = d->hwirq >> 8; |
| 548 | u8 apid = d->hwirq; |
| 549 | unsigned long flags; |
| 550 | u32 status; |
| 551 | u8 data; |
| 552 | |
| 553 | raw_spin_lock_irqsave(&pa->lock, flags); |
Gilad Avidov | d0c6ae4 | 2015-03-25 11:37:32 -0600 | [diff] [blame] | 554 | status = readl_relaxed(pa->intr + pa->ver_ops->acc_enable(apid)); |
Josh Cartwright | 67b563f | 2014-02-12 13:44:25 -0600 | [diff] [blame] | 555 | if (status & SPMI_PIC_ACC_ENABLE_BIT) { |
| 556 | status = status & ~SPMI_PIC_ACC_ENABLE_BIT; |
Gilad Avidov | d0c6ae4 | 2015-03-25 11:37:32 -0600 | [diff] [blame] | 557 | writel_relaxed(status, pa->intr + |
| 558 | pa->ver_ops->acc_enable(apid)); |
Josh Cartwright | 67b563f | 2014-02-12 13:44:25 -0600 | [diff] [blame] | 559 | } |
| 560 | raw_spin_unlock_irqrestore(&pa->lock, flags); |
| 561 | |
Abhijeet Dharmapurikar | 469f2c3 | 2016-01-05 16:52:38 -0800 | [diff] [blame] | 562 | data = BIT(irq); |
Josh Cartwright | 67b563f | 2014-02-12 13:44:25 -0600 | [diff] [blame] | 563 | qpnpint_spmi_write(d, QPNPINT_REG_EN_CLR, &data, 1); |
| 564 | } |
| 565 | |
| 566 | static void qpnpint_irq_unmask(struct irq_data *d) |
| 567 | { |
Abhijeet Dharmapurikar | fbcfb7e | 2016-01-08 12:45:20 -0800 | [diff] [blame] | 568 | struct spmi_pmic_arb *pa = irq_data_get_irq_chip_data(d); |
Josh Cartwright | 67b563f | 2014-02-12 13:44:25 -0600 | [diff] [blame] | 569 | u8 irq = d->hwirq >> 8; |
| 570 | u8 apid = d->hwirq; |
| 571 | unsigned long flags; |
| 572 | u32 status; |
| 573 | u8 data; |
| 574 | |
| 575 | raw_spin_lock_irqsave(&pa->lock, flags); |
Gilad Avidov | d0c6ae4 | 2015-03-25 11:37:32 -0600 | [diff] [blame] | 576 | status = readl_relaxed(pa->intr + pa->ver_ops->acc_enable(apid)); |
Josh Cartwright | 67b563f | 2014-02-12 13:44:25 -0600 | [diff] [blame] | 577 | if (!(status & SPMI_PIC_ACC_ENABLE_BIT)) { |
| 578 | writel_relaxed(status | SPMI_PIC_ACC_ENABLE_BIT, |
Gilad Avidov | d0c6ae4 | 2015-03-25 11:37:32 -0600 | [diff] [blame] | 579 | pa->intr + pa->ver_ops->acc_enable(apid)); |
Josh Cartwright | 67b563f | 2014-02-12 13:44:25 -0600 | [diff] [blame] | 580 | } |
| 581 | raw_spin_unlock_irqrestore(&pa->lock, flags); |
| 582 | |
Abhijeet Dharmapurikar | 469f2c3 | 2016-01-05 16:52:38 -0800 | [diff] [blame] | 583 | data = BIT(irq); |
Josh Cartwright | 67b563f | 2014-02-12 13:44:25 -0600 | [diff] [blame] | 584 | qpnpint_spmi_write(d, QPNPINT_REG_EN_SET, &data, 1); |
| 585 | } |
| 586 | |
| 587 | static void qpnpint_irq_enable(struct irq_data *d) |
| 588 | { |
| 589 | u8 irq = d->hwirq >> 8; |
| 590 | u8 data; |
| 591 | |
| 592 | qpnpint_irq_unmask(d); |
| 593 | |
Abhijeet Dharmapurikar | 469f2c3 | 2016-01-05 16:52:38 -0800 | [diff] [blame] | 594 | data = BIT(irq); |
Josh Cartwright | 67b563f | 2014-02-12 13:44:25 -0600 | [diff] [blame] | 595 | qpnpint_spmi_write(d, QPNPINT_REG_LATCHED_CLR, &data, 1); |
| 596 | } |
| 597 | |
| 598 | static int qpnpint_irq_set_type(struct irq_data *d, unsigned int flow_type) |
| 599 | { |
| 600 | struct spmi_pmic_arb_qpnpint_type type; |
| 601 | u8 irq = d->hwirq >> 8; |
Abhijeet Dharmapurikar | 469f2c3 | 2016-01-05 16:52:38 -0800 | [diff] [blame] | 602 | u8 bit_mask_irq = BIT(irq); |
Josh Cartwright | 67b563f | 2014-02-12 13:44:25 -0600 | [diff] [blame] | 603 | |
| 604 | qpnpint_spmi_read(d, QPNPINT_REG_SET_TYPE, &type, sizeof(type)); |
| 605 | |
| 606 | if (flow_type & (IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING)) { |
Abhijeet Dharmapurikar | 469f2c3 | 2016-01-05 16:52:38 -0800 | [diff] [blame] | 607 | type.type |= bit_mask_irq; |
Josh Cartwright | 67b563f | 2014-02-12 13:44:25 -0600 | [diff] [blame] | 608 | if (flow_type & IRQF_TRIGGER_RISING) |
Abhijeet Dharmapurikar | 469f2c3 | 2016-01-05 16:52:38 -0800 | [diff] [blame] | 609 | type.polarity_high |= bit_mask_irq; |
Josh Cartwright | 67b563f | 2014-02-12 13:44:25 -0600 | [diff] [blame] | 610 | if (flow_type & IRQF_TRIGGER_FALLING) |
Abhijeet Dharmapurikar | 469f2c3 | 2016-01-05 16:52:38 -0800 | [diff] [blame] | 611 | type.polarity_low |= bit_mask_irq; |
Josh Cartwright | 67b563f | 2014-02-12 13:44:25 -0600 | [diff] [blame] | 612 | } else { |
| 613 | if ((flow_type & (IRQF_TRIGGER_HIGH)) && |
| 614 | (flow_type & (IRQF_TRIGGER_LOW))) |
| 615 | return -EINVAL; |
| 616 | |
Abhijeet Dharmapurikar | 469f2c3 | 2016-01-05 16:52:38 -0800 | [diff] [blame] | 617 | type.type &= ~bit_mask_irq; /* level trig */ |
Josh Cartwright | 67b563f | 2014-02-12 13:44:25 -0600 | [diff] [blame] | 618 | if (flow_type & IRQF_TRIGGER_HIGH) |
Abhijeet Dharmapurikar | 469f2c3 | 2016-01-05 16:52:38 -0800 | [diff] [blame] | 619 | type.polarity_high |= bit_mask_irq; |
Josh Cartwright | 67b563f | 2014-02-12 13:44:25 -0600 | [diff] [blame] | 620 | else |
Abhijeet Dharmapurikar | 469f2c3 | 2016-01-05 16:52:38 -0800 | [diff] [blame] | 621 | type.polarity_low |= bit_mask_irq; |
Josh Cartwright | 67b563f | 2014-02-12 13:44:25 -0600 | [diff] [blame] | 622 | } |
| 623 | |
| 624 | qpnpint_spmi_write(d, QPNPINT_REG_SET_TYPE, &type, sizeof(type)); |
| 625 | return 0; |
| 626 | } |
| 627 | |
Courtney Cavin | 60be423 | 2015-07-30 10:53:54 -0700 | [diff] [blame] | 628 | static int qpnpint_get_irqchip_state(struct irq_data *d, |
| 629 | enum irqchip_irq_state which, |
| 630 | bool *state) |
| 631 | { |
| 632 | u8 irq = d->hwirq >> 8; |
| 633 | u8 status = 0; |
| 634 | |
| 635 | if (which != IRQCHIP_STATE_LINE_LEVEL) |
| 636 | return -EINVAL; |
| 637 | |
| 638 | qpnpint_spmi_read(d, QPNPINT_REG_RT_STS, &status, 1); |
| 639 | *state = !!(status & BIT(irq)); |
| 640 | |
| 641 | return 0; |
| 642 | } |
| 643 | |
Josh Cartwright | 67b563f | 2014-02-12 13:44:25 -0600 | [diff] [blame] | 644 | static struct irq_chip pmic_arb_irqchip = { |
| 645 | .name = "pmic_arb", |
| 646 | .irq_enable = qpnpint_irq_enable, |
| 647 | .irq_ack = qpnpint_irq_ack, |
| 648 | .irq_mask = qpnpint_irq_mask, |
| 649 | .irq_unmask = qpnpint_irq_unmask, |
| 650 | .irq_set_type = qpnpint_irq_set_type, |
Courtney Cavin | 60be423 | 2015-07-30 10:53:54 -0700 | [diff] [blame] | 651 | .irq_get_irqchip_state = qpnpint_get_irqchip_state, |
Josh Cartwright | 67b563f | 2014-02-12 13:44:25 -0600 | [diff] [blame] | 652 | .flags = IRQCHIP_MASK_ON_SUSPEND |
| 653 | | IRQCHIP_SKIP_SET_WAKE, |
| 654 | }; |
| 655 | |
| 656 | struct spmi_pmic_arb_irq_spec { |
| 657 | unsigned slave:4; |
| 658 | unsigned per:8; |
| 659 | unsigned irq:3; |
| 660 | }; |
| 661 | |
Josh Cartwright | 67b563f | 2014-02-12 13:44:25 -0600 | [diff] [blame] | 662 | static int qpnpint_irq_domain_dt_translate(struct irq_domain *d, |
| 663 | struct device_node *controller, |
| 664 | const u32 *intspec, |
| 665 | unsigned int intsize, |
| 666 | unsigned long *out_hwirq, |
| 667 | unsigned int *out_type) |
| 668 | { |
Abhijeet Dharmapurikar | fbcfb7e | 2016-01-08 12:45:20 -0800 | [diff] [blame] | 669 | struct spmi_pmic_arb *pa = d->host_data; |
Josh Cartwright | 67b563f | 2014-02-12 13:44:25 -0600 | [diff] [blame] | 670 | struct spmi_pmic_arb_irq_spec spec; |
Abhijeet Dharmapurikar | 6e9eb38 | 2016-01-08 12:50:24 -0800 | [diff] [blame^] | 671 | int rc; |
Josh Cartwright | 67b563f | 2014-02-12 13:44:25 -0600 | [diff] [blame] | 672 | u8 apid; |
| 673 | |
| 674 | dev_dbg(&pa->spmic->dev, |
| 675 | "intspec[0] 0x%1x intspec[1] 0x%02x intspec[2] 0x%02x\n", |
| 676 | intspec[0], intspec[1], intspec[2]); |
| 677 | |
Marc Zyngier | 5d4c9bc | 2015-10-13 12:51:29 +0100 | [diff] [blame] | 678 | if (irq_domain_get_of_node(d) != controller) |
Josh Cartwright | 67b563f | 2014-02-12 13:44:25 -0600 | [diff] [blame] | 679 | return -EINVAL; |
| 680 | if (intsize != 4) |
| 681 | return -EINVAL; |
| 682 | if (intspec[0] > 0xF || intspec[1] > 0xFF || intspec[2] > 0x7) |
| 683 | return -EINVAL; |
| 684 | |
| 685 | spec.slave = intspec[0]; |
| 686 | spec.per = intspec[1]; |
| 687 | spec.irq = intspec[2]; |
| 688 | |
Abhijeet Dharmapurikar | 6e9eb38 | 2016-01-08 12:50:24 -0800 | [diff] [blame^] | 689 | rc = pa->ver_ops->ppid_to_apid(pa, intspec[0], |
| 690 | (intspec[1] << 8), &apid); |
| 691 | if (rc < 0) { |
| 692 | dev_err(&pa->spmic->dev, |
| 693 | "failed to xlate sid = 0x%x, periph = 0x%x, irq = %x rc = %d\n", |
| 694 | intspec[0], intspec[1], intspec[2], rc); |
| 695 | return rc; |
| 696 | } |
Josh Cartwright | 67b563f | 2014-02-12 13:44:25 -0600 | [diff] [blame] | 697 | |
| 698 | /* Keep track of {max,min}_apid for bounding search during interrupt */ |
| 699 | if (apid > pa->max_apid) |
| 700 | pa->max_apid = apid; |
| 701 | if (apid < pa->min_apid) |
| 702 | pa->min_apid = apid; |
| 703 | |
| 704 | *out_hwirq = spec.slave << 24 |
| 705 | | spec.per << 16 |
| 706 | | spec.irq << 8 |
| 707 | | apid; |
| 708 | *out_type = intspec[3] & IRQ_TYPE_SENSE_MASK; |
| 709 | |
| 710 | dev_dbg(&pa->spmic->dev, "out_hwirq = %lu\n", *out_hwirq); |
| 711 | |
| 712 | return 0; |
| 713 | } |
| 714 | |
| 715 | static int qpnpint_irq_domain_map(struct irq_domain *d, |
| 716 | unsigned int virq, |
| 717 | irq_hw_number_t hwirq) |
| 718 | { |
Abhijeet Dharmapurikar | fbcfb7e | 2016-01-08 12:45:20 -0800 | [diff] [blame] | 719 | struct spmi_pmic_arb *pa = d->host_data; |
Josh Cartwright | 67b563f | 2014-02-12 13:44:25 -0600 | [diff] [blame] | 720 | |
| 721 | dev_dbg(&pa->spmic->dev, "virq = %u, hwirq = %lu\n", virq, hwirq); |
| 722 | |
| 723 | irq_set_chip_and_handler(virq, &pmic_arb_irqchip, handle_level_irq); |
| 724 | irq_set_chip_data(virq, d->host_data); |
| 725 | irq_set_noprobe(virq); |
| 726 | return 0; |
| 727 | } |
| 728 | |
Abhijeet Dharmapurikar | ea64f7f | 2016-01-18 22:00:33 -0800 | [diff] [blame] | 729 | static int |
Abhijeet Dharmapurikar | 6e9eb38 | 2016-01-08 12:50:24 -0800 | [diff] [blame^] | 730 | pmic_arb_ppid_to_apid_v1(struct spmi_pmic_arb *pa, u8 sid, u16 addr, u8 *apid) |
| 731 | { |
| 732 | u16 ppid = sid << 8 | ((addr >> 8) & 0xFF); |
| 733 | u32 *mapping_table = pa->mapping_table; |
| 734 | int index = 0, i; |
| 735 | u16 apid_valid; |
| 736 | u32 data; |
| 737 | |
| 738 | apid_valid = pa->ppid_to_apid[ppid]; |
| 739 | if (apid_valid & PMIC_ARB_CHAN_VALID) { |
| 740 | *apid = (apid_valid & ~PMIC_ARB_CHAN_VALID); |
| 741 | return 0; |
| 742 | } |
| 743 | |
| 744 | for (i = 0; i < SPMI_MAPPING_TABLE_TREE_DEPTH; ++i) { |
| 745 | if (!test_and_set_bit(index, pa->mapping_table_valid)) |
| 746 | mapping_table[index] = readl_relaxed(pa->cnfg + |
| 747 | SPMI_MAPPING_TABLE_REG(index)); |
| 748 | |
| 749 | data = mapping_table[index]; |
| 750 | |
| 751 | if (ppid & BIT(SPMI_MAPPING_BIT_INDEX(data))) { |
| 752 | if (SPMI_MAPPING_BIT_IS_1_FLAG(data)) { |
| 753 | index = SPMI_MAPPING_BIT_IS_1_RESULT(data); |
| 754 | } else { |
| 755 | *apid = SPMI_MAPPING_BIT_IS_1_RESULT(data); |
| 756 | pa->ppid_to_apid[ppid] |
| 757 | = *apid | PMIC_ARB_CHAN_VALID; |
| 758 | pa->apid_to_ppid[*apid] = ppid; |
| 759 | return 0; |
| 760 | } |
| 761 | } else { |
| 762 | if (SPMI_MAPPING_BIT_IS_0_FLAG(data)) { |
| 763 | index = SPMI_MAPPING_BIT_IS_0_RESULT(data); |
| 764 | } else { |
| 765 | *apid = SPMI_MAPPING_BIT_IS_0_RESULT(data); |
| 766 | pa->ppid_to_apid[ppid] |
| 767 | = *apid | PMIC_ARB_CHAN_VALID; |
| 768 | pa->apid_to_ppid[*apid] = ppid; |
| 769 | return 0; |
| 770 | } |
| 771 | } |
| 772 | } |
| 773 | |
| 774 | return -ENODEV; |
| 775 | } |
| 776 | |
| 777 | static int |
Abhijeet Dharmapurikar | fbcfb7e | 2016-01-08 12:45:20 -0800 | [diff] [blame] | 778 | pmic_arb_mode_v1(struct spmi_pmic_arb *pa, u8 sid, u16 addr, mode_t *mode) |
Abhijeet Dharmapurikar | ea64f7f | 2016-01-18 22:00:33 -0800 | [diff] [blame] | 779 | { |
| 780 | *mode = 0600; |
| 781 | return 0; |
| 782 | } |
| 783 | |
Gilad Avidov | d0c6ae4 | 2015-03-25 11:37:32 -0600 | [diff] [blame] | 784 | /* v1 offset per ee */ |
Stephen Boyd | 987a9f1 | 2015-11-17 16:13:55 -0800 | [diff] [blame] | 785 | static int |
Abhijeet Dharmapurikar | fbcfb7e | 2016-01-08 12:45:20 -0800 | [diff] [blame] | 786 | pmic_arb_offset_v1(struct spmi_pmic_arb *pa, u8 sid, u16 addr, u32 *offset) |
Gilad Avidov | d0c6ae4 | 2015-03-25 11:37:32 -0600 | [diff] [blame] | 787 | { |
Stephen Boyd | 987a9f1 | 2015-11-17 16:13:55 -0800 | [diff] [blame] | 788 | *offset = 0x800 + 0x80 * pa->channel; |
| 789 | return 0; |
Gilad Avidov | d0c6ae4 | 2015-03-25 11:37:32 -0600 | [diff] [blame] | 790 | } |
| 791 | |
Abhijeet Dharmapurikar | 39155b6 | 2016-01-06 19:55:21 -0800 | [diff] [blame] | 792 | static u16 pmic_arb_find_apid(struct spmi_pmic_arb *pa, u16 ppid) |
Stephen Boyd | 987a9f1 | 2015-11-17 16:13:55 -0800 | [diff] [blame] | 793 | { |
| 794 | u32 regval, offset; |
Abhijeet Dharmapurikar | 39155b6 | 2016-01-06 19:55:21 -0800 | [diff] [blame] | 795 | u16 apid; |
Stephen Boyd | 987a9f1 | 2015-11-17 16:13:55 -0800 | [diff] [blame] | 796 | u16 id; |
| 797 | |
| 798 | /* |
| 799 | * PMIC_ARB_REG_CHNL is a table in HW mapping channel to ppid. |
Abhijeet Dharmapurikar | 39155b6 | 2016-01-06 19:55:21 -0800 | [diff] [blame] | 800 | * ppid_to_apid is an in-memory invert of that table. |
Stephen Boyd | 987a9f1 | 2015-11-17 16:13:55 -0800 | [diff] [blame] | 801 | */ |
Abhijeet Dharmapurikar | 39155b6 | 2016-01-06 19:55:21 -0800 | [diff] [blame] | 802 | for (apid = pa->last_apid; apid < pa->max_periph; apid++) { |
Abhijeet Dharmapurikar | ea64f7f | 2016-01-18 22:00:33 -0800 | [diff] [blame] | 803 | regval = readl_relaxed(pa->cnfg + |
Abhijeet Dharmapurikar | 39155b6 | 2016-01-06 19:55:21 -0800 | [diff] [blame] | 804 | SPMI_OWNERSHIP_TABLE_REG(apid)); |
| 805 | pa->apid_to_owner[apid] = SPMI_OWNERSHIP_PERIPH2OWNER(regval); |
Abhijeet Dharmapurikar | ea64f7f | 2016-01-18 22:00:33 -0800 | [diff] [blame] | 806 | |
Abhijeet Dharmapurikar | 39155b6 | 2016-01-06 19:55:21 -0800 | [diff] [blame] | 807 | offset = PMIC_ARB_REG_CHNL(apid); |
Stephen Boyd | 987a9f1 | 2015-11-17 16:13:55 -0800 | [diff] [blame] | 808 | if (offset >= pa->core_size) |
| 809 | break; |
| 810 | |
| 811 | regval = readl_relaxed(pa->core + offset); |
| 812 | if (!regval) |
| 813 | continue; |
| 814 | |
| 815 | id = (regval >> 8) & PMIC_ARB_PPID_MASK; |
Abhijeet Dharmapurikar | 39155b6 | 2016-01-06 19:55:21 -0800 | [diff] [blame] | 816 | pa->ppid_to_apid[id] = apid | PMIC_ARB_CHAN_VALID; |
Abhijeet Dharmapurikar | 6e9eb38 | 2016-01-08 12:50:24 -0800 | [diff] [blame^] | 817 | pa->apid_to_ppid[apid] = id; |
Stephen Boyd | 987a9f1 | 2015-11-17 16:13:55 -0800 | [diff] [blame] | 818 | if (id == ppid) { |
Abhijeet Dharmapurikar | 39155b6 | 2016-01-06 19:55:21 -0800 | [diff] [blame] | 819 | apid |= PMIC_ARB_CHAN_VALID; |
Stephen Boyd | 987a9f1 | 2015-11-17 16:13:55 -0800 | [diff] [blame] | 820 | break; |
| 821 | } |
| 822 | } |
Abhijeet Dharmapurikar | 39155b6 | 2016-01-06 19:55:21 -0800 | [diff] [blame] | 823 | pa->last_apid = apid & ~PMIC_ARB_CHAN_VALID; |
Stephen Boyd | 987a9f1 | 2015-11-17 16:13:55 -0800 | [diff] [blame] | 824 | |
Abhijeet Dharmapurikar | 39155b6 | 2016-01-06 19:55:21 -0800 | [diff] [blame] | 825 | return apid; |
Stephen Boyd | 987a9f1 | 2015-11-17 16:13:55 -0800 | [diff] [blame] | 826 | } |
| 827 | |
Abhijeet Dharmapurikar | ea64f7f | 2016-01-18 22:00:33 -0800 | [diff] [blame] | 828 | static int |
Abhijeet Dharmapurikar | 6e9eb38 | 2016-01-08 12:50:24 -0800 | [diff] [blame^] | 829 | pmic_arb_ppid_to_apid_v2(struct spmi_pmic_arb *pa, u8 sid, u16 addr, u8 *apid) |
Abhijeet Dharmapurikar | ea64f7f | 2016-01-18 22:00:33 -0800 | [diff] [blame] | 830 | { |
| 831 | u16 ppid = (sid << 8) | (addr >> 8); |
Abhijeet Dharmapurikar | 6e9eb38 | 2016-01-08 12:50:24 -0800 | [diff] [blame^] | 832 | u16 apid_valid; |
Abhijeet Dharmapurikar | ea64f7f | 2016-01-18 22:00:33 -0800 | [diff] [blame] | 833 | |
Abhijeet Dharmapurikar | 6e9eb38 | 2016-01-08 12:50:24 -0800 | [diff] [blame^] | 834 | apid_valid = pa->ppid_to_apid[ppid]; |
| 835 | if (!(apid_valid & PMIC_ARB_CHAN_VALID)) |
| 836 | apid_valid = pmic_arb_find_apid(pa, ppid); |
| 837 | if (!(apid_valid & PMIC_ARB_CHAN_VALID)) |
Abhijeet Dharmapurikar | ea64f7f | 2016-01-18 22:00:33 -0800 | [diff] [blame] | 838 | return -ENODEV; |
| 839 | |
Abhijeet Dharmapurikar | 6e9eb38 | 2016-01-08 12:50:24 -0800 | [diff] [blame^] | 840 | *apid = (apid_valid & ~PMIC_ARB_CHAN_VALID); |
| 841 | return 0; |
| 842 | } |
| 843 | |
| 844 | static int |
| 845 | pmic_arb_mode_v2(struct spmi_pmic_arb *pa, u8 sid, u16 addr, mode_t *mode) |
| 846 | { |
| 847 | u8 apid; |
| 848 | u8 owner; |
| 849 | int rc; |
| 850 | |
| 851 | rc = pmic_arb_ppid_to_apid_v2(pa, sid, addr, &apid); |
| 852 | if (rc < 0) |
| 853 | return rc; |
| 854 | |
Abhijeet Dharmapurikar | ea64f7f | 2016-01-18 22:00:33 -0800 | [diff] [blame] | 855 | *mode = 0; |
| 856 | *mode |= 0400; |
| 857 | |
Abhijeet Dharmapurikar | 39155b6 | 2016-01-06 19:55:21 -0800 | [diff] [blame] | 858 | owner = pa->apid_to_owner[apid]; |
Abhijeet Dharmapurikar | ea64f7f | 2016-01-18 22:00:33 -0800 | [diff] [blame] | 859 | if (owner == pa->ee) |
| 860 | *mode |= 0200; |
| 861 | return 0; |
| 862 | } |
Stephen Boyd | 987a9f1 | 2015-11-17 16:13:55 -0800 | [diff] [blame] | 863 | |
Abhijeet Dharmapurikar | 39155b6 | 2016-01-06 19:55:21 -0800 | [diff] [blame] | 864 | /* v2 offset per ppid and per ee */ |
Stephen Boyd | 987a9f1 | 2015-11-17 16:13:55 -0800 | [diff] [blame] | 865 | static int |
Abhijeet Dharmapurikar | fbcfb7e | 2016-01-08 12:45:20 -0800 | [diff] [blame] | 866 | pmic_arb_offset_v2(struct spmi_pmic_arb *pa, u8 sid, u16 addr, u32 *offset) |
Gilad Avidov | d0c6ae4 | 2015-03-25 11:37:32 -0600 | [diff] [blame] | 867 | { |
Abhijeet Dharmapurikar | 6e9eb38 | 2016-01-08 12:50:24 -0800 | [diff] [blame^] | 868 | u8 apid; |
| 869 | int rc; |
Gilad Avidov | d0c6ae4 | 2015-03-25 11:37:32 -0600 | [diff] [blame] | 870 | |
Abhijeet Dharmapurikar | 6e9eb38 | 2016-01-08 12:50:24 -0800 | [diff] [blame^] | 871 | rc = pmic_arb_ppid_to_apid_v2(pa, sid, addr, &apid); |
| 872 | if (rc < 0) |
| 873 | return rc; |
Stephen Boyd | 987a9f1 | 2015-11-17 16:13:55 -0800 | [diff] [blame] | 874 | |
Abhijeet Dharmapurikar | 39155b6 | 2016-01-06 19:55:21 -0800 | [diff] [blame] | 875 | *offset = 0x1000 * pa->ee + 0x8000 * apid; |
Stephen Boyd | 987a9f1 | 2015-11-17 16:13:55 -0800 | [diff] [blame] | 876 | return 0; |
Gilad Avidov | d0c6ae4 | 2015-03-25 11:37:32 -0600 | [diff] [blame] | 877 | } |
| 878 | |
| 879 | static u32 pmic_arb_fmt_cmd_v1(u8 opc, u8 sid, u16 addr, u8 bc) |
| 880 | { |
| 881 | return (opc << 27) | ((sid & 0xf) << 20) | (addr << 4) | (bc & 0x7); |
| 882 | } |
| 883 | |
| 884 | static u32 pmic_arb_fmt_cmd_v2(u8 opc, u8 sid, u16 addr, u8 bc) |
| 885 | { |
| 886 | return (opc << 27) | ((addr & 0xff) << 4) | (bc & 0x7); |
| 887 | } |
| 888 | |
| 889 | static u32 pmic_arb_owner_acc_status_v1(u8 m, u8 n) |
| 890 | { |
| 891 | return 0x20 * m + 0x4 * n; |
| 892 | } |
| 893 | |
| 894 | static u32 pmic_arb_owner_acc_status_v2(u8 m, u8 n) |
| 895 | { |
| 896 | return 0x100000 + 0x1000 * m + 0x4 * n; |
| 897 | } |
| 898 | |
| 899 | static u32 pmic_arb_acc_enable_v1(u8 n) |
| 900 | { |
| 901 | return 0x200 + 0x4 * n; |
| 902 | } |
| 903 | |
| 904 | static u32 pmic_arb_acc_enable_v2(u8 n) |
| 905 | { |
| 906 | return 0x1000 * n; |
| 907 | } |
| 908 | |
| 909 | static u32 pmic_arb_irq_status_v1(u8 n) |
| 910 | { |
| 911 | return 0x600 + 0x4 * n; |
| 912 | } |
| 913 | |
| 914 | static u32 pmic_arb_irq_status_v2(u8 n) |
| 915 | { |
| 916 | return 0x4 + 0x1000 * n; |
| 917 | } |
| 918 | |
| 919 | static u32 pmic_arb_irq_clear_v1(u8 n) |
| 920 | { |
| 921 | return 0xA00 + 0x4 * n; |
| 922 | } |
| 923 | |
| 924 | static u32 pmic_arb_irq_clear_v2(u8 n) |
| 925 | { |
| 926 | return 0x8 + 0x1000 * n; |
| 927 | } |
| 928 | |
| 929 | static const struct pmic_arb_ver_ops pmic_arb_v1 = { |
Abhijeet Dharmapurikar | 6e9eb38 | 2016-01-08 12:50:24 -0800 | [diff] [blame^] | 930 | .ppid_to_apid = pmic_arb_ppid_to_apid_v1, |
Abhijeet Dharmapurikar | ea64f7f | 2016-01-18 22:00:33 -0800 | [diff] [blame] | 931 | .mode = pmic_arb_mode_v1, |
Gilad Avidov | d0c6ae4 | 2015-03-25 11:37:32 -0600 | [diff] [blame] | 932 | .non_data_cmd = pmic_arb_non_data_cmd_v1, |
| 933 | .offset = pmic_arb_offset_v1, |
| 934 | .fmt_cmd = pmic_arb_fmt_cmd_v1, |
| 935 | .owner_acc_status = pmic_arb_owner_acc_status_v1, |
| 936 | .acc_enable = pmic_arb_acc_enable_v1, |
| 937 | .irq_status = pmic_arb_irq_status_v1, |
| 938 | .irq_clear = pmic_arb_irq_clear_v1, |
| 939 | }; |
| 940 | |
| 941 | static const struct pmic_arb_ver_ops pmic_arb_v2 = { |
Abhijeet Dharmapurikar | 6e9eb38 | 2016-01-08 12:50:24 -0800 | [diff] [blame^] | 942 | .ppid_to_apid = pmic_arb_ppid_to_apid_v2, |
Abhijeet Dharmapurikar | ea64f7f | 2016-01-18 22:00:33 -0800 | [diff] [blame] | 943 | .mode = pmic_arb_mode_v2, |
Gilad Avidov | d0c6ae4 | 2015-03-25 11:37:32 -0600 | [diff] [blame] | 944 | .non_data_cmd = pmic_arb_non_data_cmd_v2, |
| 945 | .offset = pmic_arb_offset_v2, |
| 946 | .fmt_cmd = pmic_arb_fmt_cmd_v2, |
| 947 | .owner_acc_status = pmic_arb_owner_acc_status_v2, |
| 948 | .acc_enable = pmic_arb_acc_enable_v2, |
| 949 | .irq_status = pmic_arb_irq_status_v2, |
| 950 | .irq_clear = pmic_arb_irq_clear_v2, |
| 951 | }; |
| 952 | |
Josh Cartwright | 67b563f | 2014-02-12 13:44:25 -0600 | [diff] [blame] | 953 | static const struct irq_domain_ops pmic_arb_irq_domain_ops = { |
| 954 | .map = qpnpint_irq_domain_map, |
| 955 | .xlate = qpnpint_irq_domain_dt_translate, |
| 956 | }; |
| 957 | |
Kenneth Heitke | 39ae93e | 2014-02-12 13:44:24 -0600 | [diff] [blame] | 958 | static int spmi_pmic_arb_probe(struct platform_device *pdev) |
| 959 | { |
Abhijeet Dharmapurikar | fbcfb7e | 2016-01-08 12:45:20 -0800 | [diff] [blame] | 960 | struct spmi_pmic_arb *pa; |
Kenneth Heitke | 39ae93e | 2014-02-12 13:44:24 -0600 | [diff] [blame] | 961 | struct spmi_controller *ctrl; |
| 962 | struct resource *res; |
Gilad Avidov | d0c6ae4 | 2015-03-25 11:37:32 -0600 | [diff] [blame] | 963 | void __iomem *core; |
| 964 | u32 channel, ee, hw_ver; |
Stephen Boyd | 987a9f1 | 2015-11-17 16:13:55 -0800 | [diff] [blame] | 965 | int err; |
Gilad Avidov | d0c6ae4 | 2015-03-25 11:37:32 -0600 | [diff] [blame] | 966 | bool is_v1; |
Kenneth Heitke | 39ae93e | 2014-02-12 13:44:24 -0600 | [diff] [blame] | 967 | |
| 968 | ctrl = spmi_controller_alloc(&pdev->dev, sizeof(*pa)); |
| 969 | if (!ctrl) |
| 970 | return -ENOMEM; |
| 971 | |
| 972 | pa = spmi_controller_get_drvdata(ctrl); |
Josh Cartwright | 67b563f | 2014-02-12 13:44:25 -0600 | [diff] [blame] | 973 | pa->spmic = ctrl; |
Kenneth Heitke | 39ae93e | 2014-02-12 13:44:24 -0600 | [diff] [blame] | 974 | |
| 975 | res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "core"); |
Stephen Boyd | 987a9f1 | 2015-11-17 16:13:55 -0800 | [diff] [blame] | 976 | pa->core_size = resource_size(res); |
Abhijeet Dharmapurikar | ea64f7f | 2016-01-18 22:00:33 -0800 | [diff] [blame] | 977 | if (pa->core_size <= 0x800) { |
| 978 | dev_err(&pdev->dev, "core_size is smaller than 0x800. Failing Probe\n"); |
| 979 | err = -EINVAL; |
| 980 | goto err_put_ctrl; |
| 981 | } |
| 982 | |
Gilad Avidov | d0c6ae4 | 2015-03-25 11:37:32 -0600 | [diff] [blame] | 983 | core = devm_ioremap_resource(&ctrl->dev, res); |
| 984 | if (IS_ERR(core)) { |
| 985 | err = PTR_ERR(core); |
Kenneth Heitke | 39ae93e | 2014-02-12 13:44:24 -0600 | [diff] [blame] | 986 | goto err_put_ctrl; |
| 987 | } |
| 988 | |
Gilad Avidov | d0c6ae4 | 2015-03-25 11:37:32 -0600 | [diff] [blame] | 989 | hw_ver = readl_relaxed(core + PMIC_ARB_VERSION); |
| 990 | is_v1 = (hw_ver < PMIC_ARB_VERSION_V2_MIN); |
| 991 | |
| 992 | dev_info(&ctrl->dev, "PMIC Arb Version-%d (0x%x)\n", (is_v1 ? 1 : 2), |
| 993 | hw_ver); |
| 994 | |
| 995 | if (is_v1) { |
| 996 | pa->ver_ops = &pmic_arb_v1; |
| 997 | pa->wr_base = core; |
| 998 | pa->rd_base = core; |
| 999 | } else { |
Stephen Boyd | 987a9f1 | 2015-11-17 16:13:55 -0800 | [diff] [blame] | 1000 | pa->core = core; |
Gilad Avidov | d0c6ae4 | 2015-03-25 11:37:32 -0600 | [diff] [blame] | 1001 | pa->ver_ops = &pmic_arb_v2; |
| 1002 | |
Abhijeet Dharmapurikar | ea64f7f | 2016-01-18 22:00:33 -0800 | [diff] [blame] | 1003 | /* the apid to ppid table starts at PMIC_ARB_REG_CHNL(0) */ |
| 1004 | pa->max_periph = (pa->core_size - PMIC_ARB_REG_CHNL(0)) / 4; |
| 1005 | |
Gilad Avidov | d0c6ae4 | 2015-03-25 11:37:32 -0600 | [diff] [blame] | 1006 | res = platform_get_resource_byname(pdev, IORESOURCE_MEM, |
| 1007 | "obsrvr"); |
| 1008 | pa->rd_base = devm_ioremap_resource(&ctrl->dev, res); |
| 1009 | if (IS_ERR(pa->rd_base)) { |
| 1010 | err = PTR_ERR(pa->rd_base); |
| 1011 | goto err_put_ctrl; |
| 1012 | } |
| 1013 | |
| 1014 | res = platform_get_resource_byname(pdev, IORESOURCE_MEM, |
| 1015 | "chnls"); |
| 1016 | pa->wr_base = devm_ioremap_resource(&ctrl->dev, res); |
| 1017 | if (IS_ERR(pa->wr_base)) { |
| 1018 | err = PTR_ERR(pa->wr_base); |
| 1019 | goto err_put_ctrl; |
| 1020 | } |
| 1021 | |
Abhijeet Dharmapurikar | 39155b6 | 2016-01-06 19:55:21 -0800 | [diff] [blame] | 1022 | pa->ppid_to_apid = devm_kcalloc(&ctrl->dev, |
Stephen Boyd | 987a9f1 | 2015-11-17 16:13:55 -0800 | [diff] [blame] | 1023 | PMIC_ARB_MAX_PPID, |
Abhijeet Dharmapurikar | 39155b6 | 2016-01-06 19:55:21 -0800 | [diff] [blame] | 1024 | sizeof(*pa->ppid_to_apid), |
Stephen Boyd | 987a9f1 | 2015-11-17 16:13:55 -0800 | [diff] [blame] | 1025 | GFP_KERNEL); |
Abhijeet Dharmapurikar | 39155b6 | 2016-01-06 19:55:21 -0800 | [diff] [blame] | 1026 | if (!pa->ppid_to_apid) { |
Gilad Avidov | d0c6ae4 | 2015-03-25 11:37:32 -0600 | [diff] [blame] | 1027 | err = -ENOMEM; |
| 1028 | goto err_put_ctrl; |
| 1029 | } |
Abhijeet Dharmapurikar | ea64f7f | 2016-01-18 22:00:33 -0800 | [diff] [blame] | 1030 | |
Abhijeet Dharmapurikar | 39155b6 | 2016-01-06 19:55:21 -0800 | [diff] [blame] | 1031 | pa->apid_to_owner = devm_kcalloc(&ctrl->dev, |
Abhijeet Dharmapurikar | ea64f7f | 2016-01-18 22:00:33 -0800 | [diff] [blame] | 1032 | pa->max_periph, |
Abhijeet Dharmapurikar | 39155b6 | 2016-01-06 19:55:21 -0800 | [diff] [blame] | 1033 | sizeof(*pa->apid_to_owner), |
Abhijeet Dharmapurikar | ea64f7f | 2016-01-18 22:00:33 -0800 | [diff] [blame] | 1034 | GFP_KERNEL); |
Abhijeet Dharmapurikar | 39155b6 | 2016-01-06 19:55:21 -0800 | [diff] [blame] | 1035 | if (!pa->apid_to_owner) { |
Abhijeet Dharmapurikar | ea64f7f | 2016-01-18 22:00:33 -0800 | [diff] [blame] | 1036 | err = -ENOMEM; |
| 1037 | goto err_put_ctrl; |
| 1038 | } |
Gilad Avidov | d0c6ae4 | 2015-03-25 11:37:32 -0600 | [diff] [blame] | 1039 | } |
| 1040 | |
Kenneth Heitke | 39ae93e | 2014-02-12 13:44:24 -0600 | [diff] [blame] | 1041 | res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "intr"); |
| 1042 | pa->intr = devm_ioremap_resource(&ctrl->dev, res); |
| 1043 | if (IS_ERR(pa->intr)) { |
| 1044 | err = PTR_ERR(pa->intr); |
| 1045 | goto err_put_ctrl; |
| 1046 | } |
| 1047 | |
| 1048 | res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "cnfg"); |
| 1049 | pa->cnfg = devm_ioremap_resource(&ctrl->dev, res); |
| 1050 | if (IS_ERR(pa->cnfg)) { |
| 1051 | err = PTR_ERR(pa->cnfg); |
| 1052 | goto err_put_ctrl; |
| 1053 | } |
| 1054 | |
Josh Cartwright | 67b563f | 2014-02-12 13:44:25 -0600 | [diff] [blame] | 1055 | pa->irq = platform_get_irq_byname(pdev, "periph_irq"); |
| 1056 | if (pa->irq < 0) { |
| 1057 | err = pa->irq; |
| 1058 | goto err_put_ctrl; |
| 1059 | } |
| 1060 | |
Kenneth Heitke | 39ae93e | 2014-02-12 13:44:24 -0600 | [diff] [blame] | 1061 | err = of_property_read_u32(pdev->dev.of_node, "qcom,channel", &channel); |
| 1062 | if (err) { |
| 1063 | dev_err(&pdev->dev, "channel unspecified.\n"); |
| 1064 | goto err_put_ctrl; |
| 1065 | } |
| 1066 | |
| 1067 | if (channel > 5) { |
| 1068 | dev_err(&pdev->dev, "invalid channel (%u) specified.\n", |
| 1069 | channel); |
Christophe JAILLET | e98cc18 | 2016-09-26 22:24:46 +0200 | [diff] [blame] | 1070 | err = -EINVAL; |
Kenneth Heitke | 39ae93e | 2014-02-12 13:44:24 -0600 | [diff] [blame] | 1071 | goto err_put_ctrl; |
| 1072 | } |
| 1073 | |
| 1074 | pa->channel = channel; |
| 1075 | |
Josh Cartwright | 67b563f | 2014-02-12 13:44:25 -0600 | [diff] [blame] | 1076 | err = of_property_read_u32(pdev->dev.of_node, "qcom,ee", &ee); |
| 1077 | if (err) { |
| 1078 | dev_err(&pdev->dev, "EE unspecified.\n"); |
| 1079 | goto err_put_ctrl; |
| 1080 | } |
| 1081 | |
| 1082 | if (ee > 5) { |
| 1083 | dev_err(&pdev->dev, "invalid EE (%u) specified\n", ee); |
| 1084 | err = -EINVAL; |
| 1085 | goto err_put_ctrl; |
| 1086 | } |
| 1087 | |
| 1088 | pa->ee = ee; |
| 1089 | |
Stephen Boyd | 987a9f1 | 2015-11-17 16:13:55 -0800 | [diff] [blame] | 1090 | pa->apid_to_ppid = devm_kcalloc(&ctrl->dev, PMIC_ARB_MAX_PERIPHS, |
| 1091 | sizeof(*pa->apid_to_ppid), |
| 1092 | GFP_KERNEL); |
| 1093 | if (!pa->apid_to_ppid) { |
| 1094 | err = -ENOMEM; |
| 1095 | goto err_put_ctrl; |
| 1096 | } |
| 1097 | |
| 1098 | pa->mapping_table = devm_kcalloc(&ctrl->dev, PMIC_ARB_MAX_PERIPHS - 1, |
| 1099 | sizeof(*pa->mapping_table), GFP_KERNEL); |
| 1100 | if (!pa->mapping_table) { |
| 1101 | err = -ENOMEM; |
| 1102 | goto err_put_ctrl; |
| 1103 | } |
Josh Cartwright | 67b563f | 2014-02-12 13:44:25 -0600 | [diff] [blame] | 1104 | |
| 1105 | /* Initialize max_apid/min_apid to the opposite bounds, during |
| 1106 | * the irq domain translation, we are sure to update these */ |
| 1107 | pa->max_apid = 0; |
| 1108 | pa->min_apid = PMIC_ARB_MAX_PERIPHS - 1; |
| 1109 | |
Kenneth Heitke | 39ae93e | 2014-02-12 13:44:24 -0600 | [diff] [blame] | 1110 | platform_set_drvdata(pdev, ctrl); |
| 1111 | raw_spin_lock_init(&pa->lock); |
| 1112 | |
| 1113 | ctrl->cmd = pmic_arb_cmd; |
| 1114 | ctrl->read_cmd = pmic_arb_read_cmd; |
| 1115 | ctrl->write_cmd = pmic_arb_write_cmd; |
| 1116 | |
Josh Cartwright | 67b563f | 2014-02-12 13:44:25 -0600 | [diff] [blame] | 1117 | dev_dbg(&pdev->dev, "adding irq domain\n"); |
| 1118 | pa->domain = irq_domain_add_tree(pdev->dev.of_node, |
| 1119 | &pmic_arb_irq_domain_ops, pa); |
| 1120 | if (!pa->domain) { |
| 1121 | dev_err(&pdev->dev, "unable to create irq_domain\n"); |
| 1122 | err = -ENOMEM; |
| 1123 | goto err_put_ctrl; |
| 1124 | } |
| 1125 | |
Thomas Gleixner | fb68ba6 | 2015-07-13 20:52:24 +0000 | [diff] [blame] | 1126 | irq_set_chained_handler_and_data(pa->irq, pmic_arb_chained_irq, pa); |
Josh Cartwright | 67b563f | 2014-02-12 13:44:25 -0600 | [diff] [blame] | 1127 | |
Kenneth Heitke | 39ae93e | 2014-02-12 13:44:24 -0600 | [diff] [blame] | 1128 | err = spmi_controller_add(ctrl); |
| 1129 | if (err) |
Josh Cartwright | 67b563f | 2014-02-12 13:44:25 -0600 | [diff] [blame] | 1130 | goto err_domain_remove; |
Kenneth Heitke | 39ae93e | 2014-02-12 13:44:24 -0600 | [diff] [blame] | 1131 | |
Kenneth Heitke | 39ae93e | 2014-02-12 13:44:24 -0600 | [diff] [blame] | 1132 | return 0; |
| 1133 | |
Josh Cartwright | 67b563f | 2014-02-12 13:44:25 -0600 | [diff] [blame] | 1134 | err_domain_remove: |
Thomas Gleixner | fb68ba6 | 2015-07-13 20:52:24 +0000 | [diff] [blame] | 1135 | irq_set_chained_handler_and_data(pa->irq, NULL, NULL); |
Josh Cartwright | 67b563f | 2014-02-12 13:44:25 -0600 | [diff] [blame] | 1136 | irq_domain_remove(pa->domain); |
Kenneth Heitke | 39ae93e | 2014-02-12 13:44:24 -0600 | [diff] [blame] | 1137 | err_put_ctrl: |
| 1138 | spmi_controller_put(ctrl); |
| 1139 | return err; |
| 1140 | } |
| 1141 | |
| 1142 | static int spmi_pmic_arb_remove(struct platform_device *pdev) |
| 1143 | { |
| 1144 | struct spmi_controller *ctrl = platform_get_drvdata(pdev); |
Abhijeet Dharmapurikar | fbcfb7e | 2016-01-08 12:45:20 -0800 | [diff] [blame] | 1145 | struct spmi_pmic_arb *pa = spmi_controller_get_drvdata(ctrl); |
Kenneth Heitke | 39ae93e | 2014-02-12 13:44:24 -0600 | [diff] [blame] | 1146 | spmi_controller_remove(ctrl); |
Thomas Gleixner | fb68ba6 | 2015-07-13 20:52:24 +0000 | [diff] [blame] | 1147 | irq_set_chained_handler_and_data(pa->irq, NULL, NULL); |
Josh Cartwright | 67b563f | 2014-02-12 13:44:25 -0600 | [diff] [blame] | 1148 | irq_domain_remove(pa->domain); |
Kenneth Heitke | 39ae93e | 2014-02-12 13:44:24 -0600 | [diff] [blame] | 1149 | spmi_controller_put(ctrl); |
| 1150 | return 0; |
| 1151 | } |
| 1152 | |
| 1153 | static const struct of_device_id spmi_pmic_arb_match_table[] = { |
| 1154 | { .compatible = "qcom,spmi-pmic-arb", }, |
| 1155 | {}, |
| 1156 | }; |
| 1157 | MODULE_DEVICE_TABLE(of, spmi_pmic_arb_match_table); |
| 1158 | |
| 1159 | static struct platform_driver spmi_pmic_arb_driver = { |
| 1160 | .probe = spmi_pmic_arb_probe, |
| 1161 | .remove = spmi_pmic_arb_remove, |
| 1162 | .driver = { |
| 1163 | .name = "spmi_pmic_arb", |
Kenneth Heitke | 39ae93e | 2014-02-12 13:44:24 -0600 | [diff] [blame] | 1164 | .of_match_table = spmi_pmic_arb_match_table, |
| 1165 | }, |
| 1166 | }; |
Abhijeet Dharmapurikar | df9bf94 | 2015-09-23 11:36:23 -0700 | [diff] [blame] | 1167 | |
| 1168 | int __init spmi_pmic_arb_init(void) |
| 1169 | { |
| 1170 | return platform_driver_register(&spmi_pmic_arb_driver); |
| 1171 | } |
| 1172 | arch_initcall(spmi_pmic_arb_init); |
Kenneth Heitke | 39ae93e | 2014-02-12 13:44:24 -0600 | [diff] [blame] | 1173 | |
| 1174 | MODULE_LICENSE("GPL v2"); |
| 1175 | MODULE_ALIAS("platform:spmi_pmic_arb"); |