^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) #include <linux/io.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) #include <linux/ioport.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) #include <linux/export.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) #include <linux/of.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) #include <linux/platform_device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) static unsigned long acpi_iobase;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #define ACPI_PM_EVT_BLK (acpi_iobase + 0x00) /* 4 bytes */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #define ACPI_PM_CNT_BLK (acpi_iobase + 0x04) /* 2 bytes */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #define ACPI_PMA_CNT_BLK (acpi_iobase + 0x0F) /* 1 byte */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #define ACPI_PM_TMR_BLK (acpi_iobase + 0x18) /* 4 bytes */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #define ACPI_GPE0_BLK (acpi_iobase + 0x10) /* 8 bytes */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #define ACPI_END (acpi_iobase + 0x80)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #define PM_INDEX 0xCD6
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #define PM_DATA 0xCD7
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #define PM2_INDEX 0xCD0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) #define PM2_DATA 0xCD1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) static void pmio_write_index(u16 index, u8 reg, u8 value)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) outb(reg, index);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) outb(value, index + 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) static u8 pmio_read_index(u16 index, u8 reg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) outb(reg, index);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) return inb(index + 1);
^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) void pm_iowrite(u8 reg, u8 value)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) pmio_write_index(PM_INDEX, reg, value);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) EXPORT_SYMBOL(pm_iowrite);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) u8 pm_ioread(u8 reg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) return pmio_read_index(PM_INDEX, reg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) EXPORT_SYMBOL(pm_ioread);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) void pm2_iowrite(u8 reg, u8 value)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) pmio_write_index(PM2_INDEX, reg, value);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) EXPORT_SYMBOL(pm2_iowrite);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) u8 pm2_ioread(u8 reg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) return pmio_read_index(PM2_INDEX, reg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) EXPORT_SYMBOL(pm2_ioread);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) static void acpi_hw_clear_status(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) u16 value;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) /* PMStatus: Clear WakeStatus/PwrBtnStatus */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) value = inw(ACPI_PM_EVT_BLK);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) value |= (1 << 8 | 1 << 15);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) outw(value, ACPI_PM_EVT_BLK);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) /* GPEStatus: Clear all generated events */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) outl(inl(ACPI_GPE0_BLK), ACPI_GPE0_BLK);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) static void acpi_registers_setup(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) u32 value;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) /* PM Status Base */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) pm_iowrite(0x20, ACPI_PM_EVT_BLK & 0xff);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) pm_iowrite(0x21, ACPI_PM_EVT_BLK >> 8);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) /* PM Control Base */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) pm_iowrite(0x22, ACPI_PM_CNT_BLK & 0xff);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) pm_iowrite(0x23, ACPI_PM_CNT_BLK >> 8);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) /* GPM Base */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) pm_iowrite(0x28, ACPI_GPE0_BLK & 0xff);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) pm_iowrite(0x29, ACPI_GPE0_BLK >> 8);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) /* ACPI End */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) pm_iowrite(0x2e, ACPI_END & 0xff);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) pm_iowrite(0x2f, ACPI_END >> 8);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) /* IO Decode: When AcpiDecodeEnable set, South-Bridge uses the contents
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) * of the PM registers at index 0x20~0x2B to decode ACPI I/O address. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) pm_iowrite(0x0e, 1 << 3);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) /* SCI_EN set */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) outw(1, ACPI_PM_CNT_BLK);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) /* Enable to generate SCI */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) pm_iowrite(0x10, pm_ioread(0x10) | 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) /* GPM3/GPM9 enable */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) value = inl(ACPI_GPE0_BLK + 4);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) outl(value | (1 << 14) | (1 << 22), ACPI_GPE0_BLK + 4);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) /* Set GPM9 as input */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) pm_iowrite(0x8d, pm_ioread(0x8d) & (~(1 << 1)));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) /* Set GPM9 as non-output */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) pm_iowrite(0x94, pm_ioread(0x94) | (1 << 3));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) /* GPM3 config ACPI trigger SCIOUT */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) pm_iowrite(0x33, pm_ioread(0x33) & (~(3 << 4)));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) /* GPM9 config ACPI trigger SCIOUT */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) pm_iowrite(0x3d, pm_ioread(0x3d) & (~(3 << 2)));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) /* GPM3 config falling edge trigger */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) pm_iowrite(0x37, pm_ioread(0x37) & (~(1 << 6)));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) /* No wait for STPGNT# in ACPI Sx state */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) pm_iowrite(0x7c, pm_ioread(0x7c) | (1 << 6));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) /* Set GPM3 pull-down enable */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) value = pm2_ioread(0xf6);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) value |= ((1 << 7) | (1 << 3));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) pm2_iowrite(0xf6, value);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) /* Set GPM9 pull-down enable */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) value = pm2_ioread(0xf8);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) value |= ((1 << 5) | (1 << 1));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) pm2_iowrite(0xf8, value);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) static int rs780e_acpi_probe(struct platform_device *pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) struct resource *res;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) res = platform_get_resource(pdev, IORESOURCE_IO, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) if (!res)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) /* SCI interrupt need acpi space, allocate here */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) if (!request_region(res->start, resource_size(res), "acpi")) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) pr_err("RS780E-ACPI: Failed to request IO Region\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) return -EBUSY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) acpi_iobase = res->start;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) acpi_registers_setup();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) acpi_hw_clear_status();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) return 0;
^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 const struct of_device_id rs780e_acpi_match[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) { .compatible = "loongson,rs780e-acpi" },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) {},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) static struct platform_driver rs780e_acpi_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) .probe = rs780e_acpi_probe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) .driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) .name = "RS780E-ACPI",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) .of_match_table = rs780e_acpi_match,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) builtin_platform_driver(rs780e_acpi_driver);
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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