^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) * Atari Falcon IDE Driver
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) * Created 12 Jul 1997 by Geert Uytterhoeven
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) * This file is subject to the terms and conditions of the GNU General Public
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) * License. See the file COPYING in the main directory of this archive for
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) * more details.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/types.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/mm.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/interrupt.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/blkdev.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <linux/ide.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include <linux/platform_device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #include <asm/setup.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) #include <asm/atarihw.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) #include <asm/atariints.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) #include <asm/atari_stdma.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) #include <asm/ide.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) #define DRV_NAME "falconide"
^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) * Offsets from base address
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) #define ATA_HD_CONTROL 0x39
^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) * falconide_intr_lock is used to obtain access to the IDE interrupt,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) * which is shared between several drivers.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) static int falconide_intr_lock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) static void falconide_release_lock(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) if (falconide_intr_lock == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) printk(KERN_ERR "%s: bug\n", __func__);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) falconide_intr_lock = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) stdma_release();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) static void falconide_get_lock(irq_handler_t handler, void *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) if (falconide_intr_lock == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) if (in_interrupt() > 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) panic("Falcon IDE hasn't ST-DMA lock in interrupt");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) stdma_lock(handler, data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) falconide_intr_lock = 1;
^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)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) static void falconide_input_data(ide_drive_t *drive, struct ide_cmd *cmd,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) void *buf, unsigned int len)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) unsigned long data_addr = drive->hwif->io_ports.data_addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) if (drive->media == ide_disk && cmd && (cmd->tf_flags & IDE_TFLAG_FS)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) __ide_mm_insw(data_addr, buf, (len + 1) / 2);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) raw_insw_swapw((u16 *)data_addr, buf, (len + 1) / 2);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) static void falconide_output_data(ide_drive_t *drive, struct ide_cmd *cmd,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) void *buf, unsigned int len)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) unsigned long data_addr = drive->hwif->io_ports.data_addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) if (drive->media == ide_disk && cmd && (cmd->tf_flags & IDE_TFLAG_FS)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) __ide_mm_outsw(data_addr, buf, (len + 1) / 2);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) return;
^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) raw_outsw_swapw((u16 *)data_addr, buf, (len + 1) / 2);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) /* Atari has a byte-swapped IDE interface */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) static const struct ide_tp_ops falconide_tp_ops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) .exec_command = ide_exec_command,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) .read_status = ide_read_status,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) .read_altstatus = ide_read_altstatus,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) .write_devctl = ide_write_devctl,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) .dev_select = ide_dev_select,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) .tf_load = ide_tf_load,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) .tf_read = ide_tf_read,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) .input_data = falconide_input_data,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) .output_data = falconide_output_data,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) static const struct ide_port_info falconide_port_info = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) .get_lock = falconide_get_lock,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) .release_lock = falconide_release_lock,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) .tp_ops = &falconide_tp_ops,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) .host_flags = IDE_HFLAG_MMIO | IDE_HFLAG_SERIALIZE |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) IDE_HFLAG_NO_DMA,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) .irq_flags = IRQF_SHARED,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) .chipset = ide_generic,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) static void __init falconide_setup_ports(struct ide_hw *hw, unsigned long base)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) memset(hw, 0, sizeof(*hw));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) hw->io_ports.data_addr = base;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) for (i = 1; i < 8; i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) hw->io_ports_array[i] = base + 1 + i * 4;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) hw->io_ports.ctl_addr = base + ATA_HD_CONTROL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) hw->irq = IRQ_MFP_IDE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) }
^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) * Probe for a Falcon IDE interface
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) static int __init falconide_init(struct platform_device *pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) struct resource *res;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) struct ide_host *host;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) struct ide_hw hw, *hws[] = { &hw };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) unsigned long base;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) int rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) dev_info(&pdev->dev, "Atari Falcon IDE controller\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) if (!res)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) if (!devm_request_mem_region(&pdev->dev, res->start,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) resource_size(res), DRV_NAME)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) dev_err(&pdev->dev, "resources busy\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) return -EBUSY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) base = (unsigned long)res->start;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) falconide_setup_ports(&hw, base);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) host = ide_host_alloc(&falconide_port_info, hws, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) if (host == NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) rc = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) goto err;
^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) falconide_get_lock(NULL, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) rc = ide_host_register(host, &falconide_port_info, hws);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) falconide_release_lock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) if (rc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) goto err_free;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) platform_set_drvdata(pdev, host);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) err_free:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) ide_host_free(host);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) err:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) release_mem_region(res->start, resource_size(res));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) static int falconide_remove(struct platform_device *pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) struct ide_host *host = platform_get_drvdata(pdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) ide_host_remove(host);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) static struct platform_driver ide_falcon_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) .remove = falconide_remove,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) .driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) .name = "atari-falcon-ide",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) module_platform_driver_probe(ide_falcon_driver, falconide_init);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) MODULE_AUTHOR("Geert Uytterhoeven");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) MODULE_DESCRIPTION("low-level driver for Atari Falcon IDE");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) MODULE_LICENSE("GPL");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) MODULE_ALIAS("platform:atari-falcon-ide");
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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