^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0-or-later
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * at91_cf.c -- AT91 CompactFlash controller driver
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Copyright (C) 2005 David Brownell
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/platform_device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/errno.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/interrupt.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/gpio.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <linux/platform_data/atmel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <linux/io.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include <linux/sizes.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/mfd/syscon/atmel-mc.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) #include <linux/of.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) #include <linux/of_device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) #include <linux/of_gpio.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) #include <linux/regmap.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) #include <pcmcia/ss.h>
^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) * A0..A10 work in each range; A23 indicates I/O space; A25 is CFRNW;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) * some other bit in {A24,A22..A11} is nREG to flag memory access
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) * (vs attributes). So more than 2KB/region would just be waste.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) * Note: These are offsets from the physical base address.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) #define CF_ATTR_PHYS (0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) #define CF_IO_PHYS (1 << 23)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) #define CF_MEM_PHYS (0x017ff800)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) struct regmap *mc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) /*--------------------------------------------------------------------------*/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) struct at91_cf_socket {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) struct pcmcia_socket socket;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) unsigned present:1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) struct platform_device *pdev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) struct at91_cf_data *board;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) unsigned long phys_baseaddr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) static inline int at91_cf_present(struct at91_cf_socket *cf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) return !gpio_get_value(cf->board->det_pin);
^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) /*--------------------------------------------------------------------------*/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) static int at91_cf_ss_init(struct pcmcia_socket *s)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) static irqreturn_t at91_cf_irq(int irq, void *_cf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) struct at91_cf_socket *cf = _cf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) if (irq == gpio_to_irq(cf->board->det_pin)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) unsigned present = at91_cf_present(cf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) /* kick pccard as needed */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) if (present != cf->present) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) cf->present = present;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) dev_dbg(&cf->pdev->dev, "card %s\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) present ? "present" : "gone");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) pcmcia_parse_events(&cf->socket, SS_DETECT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) }
^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 int at91_cf_get_status(struct pcmcia_socket *s, u_int *sp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) struct at91_cf_socket *cf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) if (!sp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) cf = container_of(s, struct at91_cf_socket, socket);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) /* NOTE: CF is always 3VCARD */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) if (at91_cf_present(cf)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) int rdy = gpio_is_valid(cf->board->irq_pin); /* RDY/nIRQ */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) int vcc = gpio_is_valid(cf->board->vcc_pin);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) *sp = SS_DETECT | SS_3VCARD;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) if (!rdy || gpio_get_value(cf->board->irq_pin))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) *sp |= SS_READY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) if (!vcc || gpio_get_value(cf->board->vcc_pin))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) *sp |= SS_POWERON;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) } else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) *sp = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) static int
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) at91_cf_set_socket(struct pcmcia_socket *sock, struct socket_state_t *s)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) struct at91_cf_socket *cf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) cf = container_of(sock, struct at91_cf_socket, socket);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) /* switch Vcc if needed and possible */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) if (gpio_is_valid(cf->board->vcc_pin)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) switch (s->Vcc) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) case 0:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) gpio_set_value(cf->board->vcc_pin, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) case 33:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) gpio_set_value(cf->board->vcc_pin, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) /* toggle reset if needed */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) gpio_set_value(cf->board->rst_pin, s->flags & SS_RESET);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) dev_dbg(&cf->pdev->dev, "Vcc %d, io_irq %d, flags %04x csc %04x\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) s->Vcc, s->io_irq, s->flags, s->csc_mask);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) static int at91_cf_ss_suspend(struct pcmcia_socket *s)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) return at91_cf_set_socket(s, &dead_socket);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) /* we already mapped the I/O region */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) static int at91_cf_set_io_map(struct pcmcia_socket *s, struct pccard_io_map *io)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) struct at91_cf_socket *cf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) u32 csr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) cf = container_of(s, struct at91_cf_socket, socket);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) io->flags &= (MAP_ACTIVE | MAP_16BIT | MAP_AUTOSZ);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) * Use 16 bit accesses unless/until we need 8-bit i/o space.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) * NOTE: this CF controller ignores IOIS16, so we can't really do
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) * MAP_AUTOSZ. The 16bit mode allows single byte access on either
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) * D0-D7 (even addr) or D8-D15 (odd), so it's close enough for many
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) * purposes (and handles ide-cs).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) * The 8bit mode is needed for odd byte access on D0-D7. It seems
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) * some cards only like that way to get at the odd byte, despite
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) * CF 3.0 spec table 35 also giving the D8-D15 option.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) if (!(io->flags & (MAP_16BIT | MAP_AUTOSZ))) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) csr = AT91_MC_SMC_DBW_8;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) dev_dbg(&cf->pdev->dev, "8bit i/o bus\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) csr = AT91_MC_SMC_DBW_16;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) dev_dbg(&cf->pdev->dev, "16bit i/o bus\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) regmap_update_bits(mc, AT91_MC_SMC_CSR(cf->board->chipselect),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) AT91_MC_SMC_DBW, csr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) io->start = cf->socket.io_offset;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) io->stop = io->start + SZ_2K - 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) /* pcmcia layer maps/unmaps mem regions */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) static int
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) at91_cf_set_mem_map(struct pcmcia_socket *s, struct pccard_mem_map *map)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) struct at91_cf_socket *cf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) if (map->card_start)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) cf = container_of(s, struct at91_cf_socket, socket);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) map->flags &= (MAP_ACTIVE | MAP_ATTRIB | MAP_16BIT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) if (map->flags & MAP_ATTRIB)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) map->static_start = cf->phys_baseaddr + CF_ATTR_PHYS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) map->static_start = cf->phys_baseaddr + CF_MEM_PHYS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) static struct pccard_operations at91_cf_ops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) .init = at91_cf_ss_init,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) .suspend = at91_cf_ss_suspend,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) .get_status = at91_cf_get_status,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) .set_socket = at91_cf_set_socket,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) .set_io_map = at91_cf_set_io_map,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) .set_mem_map = at91_cf_set_mem_map,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209)
^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) #if defined(CONFIG_OF)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) static const struct of_device_id at91_cf_dt_ids[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) { .compatible = "atmel,at91rm9200-cf" },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) { /* sentinel */ }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) MODULE_DEVICE_TABLE(of, at91_cf_dt_ids);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) static int at91_cf_dt_init(struct platform_device *pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) struct at91_cf_data *board;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) board = devm_kzalloc(&pdev->dev, sizeof(*board), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) if (!board)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) board->irq_pin = of_get_gpio(pdev->dev.of_node, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) board->det_pin = of_get_gpio(pdev->dev.of_node, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) board->vcc_pin = of_get_gpio(pdev->dev.of_node, 2);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) board->rst_pin = of_get_gpio(pdev->dev.of_node, 3);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) pdev->dev.platform_data = board;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) mc = syscon_regmap_lookup_by_compatible("atmel,at91rm9200-sdramc");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) return PTR_ERR_OR_ZERO(mc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) static int at91_cf_dt_init(struct platform_device *pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) static int at91_cf_probe(struct platform_device *pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) struct at91_cf_socket *cf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) struct at91_cf_data *board = pdev->dev.platform_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) struct resource *io;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) int status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) if (!board) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) status = at91_cf_dt_init(pdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) if (status)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) return status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) board = pdev->dev.platform_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) if (!gpio_is_valid(board->det_pin) || !gpio_is_valid(board->rst_pin))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) io = platform_get_resource(pdev, IORESOURCE_MEM, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) if (!io)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) cf = devm_kzalloc(&pdev->dev, sizeof(*cf), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) if (!cf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) cf->board = board;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) cf->pdev = pdev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) cf->phys_baseaddr = io->start;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) platform_set_drvdata(pdev, cf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) /* must be a GPIO; ergo must trigger on both edges */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) status = devm_gpio_request(&pdev->dev, board->det_pin, "cf_det");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) if (status < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) return status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) status = devm_request_irq(&pdev->dev, gpio_to_irq(board->det_pin),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) at91_cf_irq, 0, "at91_cf detect", cf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) if (status < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) return status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) device_init_wakeup(&pdev->dev, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) status = devm_gpio_request(&pdev->dev, board->rst_pin, "cf_rst");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) if (status < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) goto fail0a;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) if (gpio_is_valid(board->vcc_pin)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) status = devm_gpio_request(&pdev->dev, board->vcc_pin, "cf_vcc");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) if (status < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) goto fail0a;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) * The card driver will request this irq later as needed.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) * but it causes lots of "irqNN: nobody cared" messages
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) * unless we report that we handle everything (sigh).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) * (Note: DK board doesn't wire the IRQ pin...)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) if (gpio_is_valid(board->irq_pin)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) status = devm_gpio_request(&pdev->dev, board->irq_pin, "cf_irq");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) if (status < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) goto fail0a;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) status = devm_request_irq(&pdev->dev, gpio_to_irq(board->irq_pin),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) at91_cf_irq, IRQF_SHARED, "at91_cf", cf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) if (status < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) goto fail0a;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) cf->socket.pci_irq = gpio_to_irq(board->irq_pin);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) } else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) cf->socket.pci_irq = nr_irqs + 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) * pcmcia layer only remaps "real" memory not iospace
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) * io_offset is set to 0x10000 to avoid the check in static_find_io().
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) * */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) cf->socket.io_offset = 0x10000;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) status = pci_ioremap_io(0x10000, cf->phys_baseaddr + CF_IO_PHYS);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) if (status)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) goto fail0a;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) /* reserve chip-select regions */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) if (!devm_request_mem_region(&pdev->dev, io->start, resource_size(io), "at91_cf")) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) status = -ENXIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) goto fail0a;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) dev_info(&pdev->dev, "irqs det #%d, io #%d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) gpio_to_irq(board->det_pin), gpio_to_irq(board->irq_pin));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) cf->socket.owner = THIS_MODULE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) cf->socket.dev.parent = &pdev->dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) cf->socket.ops = &at91_cf_ops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) cf->socket.resource_ops = &pccard_static_ops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) cf->socket.features = SS_CAP_PCCARD | SS_CAP_STATIC_MAP
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) | SS_CAP_MEM_ALIGN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) cf->socket.map_size = SZ_2K;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) cf->socket.io[0].res = io;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) status = pcmcia_register_socket(&cf->socket);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) if (status < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) goto fail0a;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) fail0a:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) device_init_wakeup(&pdev->dev, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) return status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) static int at91_cf_remove(struct platform_device *pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) struct at91_cf_socket *cf = platform_get_drvdata(pdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) pcmcia_unregister_socket(&cf->socket);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) device_init_wakeup(&pdev->dev, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) #ifdef CONFIG_PM
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) static int at91_cf_suspend(struct platform_device *pdev, pm_message_t mesg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) struct at91_cf_socket *cf = platform_get_drvdata(pdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) struct at91_cf_data *board = cf->board;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) if (device_may_wakeup(&pdev->dev)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) enable_irq_wake(gpio_to_irq(board->det_pin));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374) if (gpio_is_valid(board->irq_pin))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) enable_irq_wake(gpio_to_irq(board->irq_pin));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380) static int at91_cf_resume(struct platform_device *pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382) struct at91_cf_socket *cf = platform_get_drvdata(pdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383) struct at91_cf_data *board = cf->board;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385) if (device_may_wakeup(&pdev->dev)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386) disable_irq_wake(gpio_to_irq(board->det_pin));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387) if (gpio_is_valid(board->irq_pin))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) disable_irq_wake(gpio_to_irq(board->irq_pin));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395) #define at91_cf_suspend NULL
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396) #define at91_cf_resume NULL
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399) static struct platform_driver at91_cf_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400) .driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401) .name = "at91_cf",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402) .of_match_table = of_match_ptr(at91_cf_dt_ids),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404) .probe = at91_cf_probe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405) .remove = at91_cf_remove,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406) .suspend = at91_cf_suspend,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407) .resume = at91_cf_resume,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410) module_platform_driver(at91_cf_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412) MODULE_DESCRIPTION("AT91 Compact Flash Driver");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413) MODULE_AUTHOR("David Brownell");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414) MODULE_LICENSE("GPL");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415) MODULE_ALIAS("platform:at91_cf");
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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