Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   1) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   2)  *  Amiga Gayle IDE Driver
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   3)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   4)  *     Created 9 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/types.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  12) #include <linux/mm.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/blkdev.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  15) #include <linux/ide.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  16) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  17) #include <linux/zorro.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  18) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  19) #include <linux/platform_device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  20) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  21) #include <asm/setup.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22) #include <asm/amigahw.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23) #include <asm/amigaints.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  24) #include <asm/amigayle.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  25) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  26) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27)     /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28)      *  Offsets from one of the above bases
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29)      */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  31) #define GAYLE_CONTROL	0x101a
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33)     /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34)      *  These are at different offsets from the base
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35)      */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37) #define GAYLE_IRQ_4000	0xdd3020	/* MSB = 1, Harddisk is source of */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  38) #define GAYLE_IRQ_1200	0xda9000	/* interrupt */
^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)      *  Offset of the secondary port for IDE doublers
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43)      *  Note that GAYLE_CONTROL is NOT available then!
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44)      */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46) #define GAYLE_NEXT_PORT	0x1000
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  47) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  48) #define GAYLE_NUM_HWIFS		2
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49) #define GAYLE_NUM_PROBE_HWIFS	(ide_doubler ? GAYLE_NUM_HWIFS : \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50) 					       GAYLE_NUM_HWIFS-1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51) #define GAYLE_HAS_CONTROL_REG	(!ide_doubler)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53) static bool ide_doubler;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54) module_param_named(doubler, ide_doubler, bool, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55) MODULE_PARM_DESC(doubler, "enable support for IDE doublers");
^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)      *  Check and acknowledge the interrupt status
^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 int gayle_test_irq(ide_hwif_t *hwif)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63) 	unsigned char ch;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65) 	ch = z_readb(hwif->io_ports.irq_addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66) 	if (!(ch & GAYLE_IRQ_IDE))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67) 		return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68) 	return 1;
^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) static void gayle_a1200_clear_irq(ide_drive_t *drive)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  72) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  73) 	ide_hwif_t *hwif = drive->hwif;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  74) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  75) 	(void)z_readb(hwif->io_ports.status_addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  76) 	z_writeb(0x7c, hwif->io_ports.irq_addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  77) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79) static void __init gayle_setup_ports(struct ide_hw *hw, unsigned long base,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80) 				     unsigned long ctl, unsigned long irq_port)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82) 	int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84) 	memset(hw, 0, sizeof(*hw));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86) 	hw->io_ports.data_addr = base;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88) 	for (i = 1; i < 8; i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89) 		hw->io_ports_array[i] = base + 2 + i * 4;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91) 	hw->io_ports.ctl_addr = ctl;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92) 	hw->io_ports.irq_addr = irq_port;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94) 	hw->irq = IRQ_AMIGA_PORTS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97) static const struct ide_port_ops gayle_a4000_port_ops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  98) 	.test_irq		= gayle_test_irq,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  99) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) static const struct ide_port_ops gayle_a1200_port_ops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) 	.clear_irq		= gayle_a1200_clear_irq,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) 	.test_irq		= gayle_test_irq,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) static const struct ide_port_info gayle_port_info = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) 	.host_flags		= IDE_HFLAG_MMIO | IDE_HFLAG_SERIALIZE |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) 				  IDE_HFLAG_NO_DMA,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) 	.irq_flags		= IRQF_SHARED,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) 	.chipset		= ide_generic,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113)     /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114)      *  Probe for a Gayle IDE interface (and optionally for an IDE doubler)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115)      */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) static int __init amiga_gayle_ide_probe(struct platform_device *pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) 	struct resource *res;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) 	struct gayle_ide_platform_data *pdata;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) 	unsigned long base, ctrlport, irqport;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) 	unsigned int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) 	int error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) 	struct ide_hw hw[GAYLE_NUM_HWIFS], *hws[GAYLE_NUM_HWIFS];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) 	struct ide_port_info d = gayle_port_info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) 	struct ide_host *host;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) 	if (!res)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) 		return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) 	if (!request_mem_region(res->start, resource_size(res), "IDE"))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) 		return -EBUSY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) 	pdata = dev_get_platdata(&pdev->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) 	pr_info("ide: Gayle IDE controller (A%u style%s)\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) 		pdata->explicit_ack ? 1200 : 4000,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) 		ide_doubler ? ", IDE doubler" : "");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) 	base = (unsigned long)ZTWO_VADDR(pdata->base);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) 	ctrlport = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) 	irqport = (unsigned long)ZTWO_VADDR(pdata->irqport);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) 	if (pdata->explicit_ack)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) 		d.port_ops = &gayle_a1200_port_ops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) 	else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) 		d.port_ops = &gayle_a4000_port_ops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) 	for (i = 0; i < GAYLE_NUM_PROBE_HWIFS; i++, base += GAYLE_NEXT_PORT) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) 		if (GAYLE_HAS_CONTROL_REG)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) 			ctrlport = base + GAYLE_CONTROL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) 		gayle_setup_ports(&hw[i], base, ctrlport, irqport);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) 		hws[i] = &hw[i];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) 	error = ide_host_add(&d, hws, i, &host);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) 	if (error)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) 		goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) 	platform_set_drvdata(pdev, host);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) 	release_mem_region(res->start, resource_size(res));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) 	return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) static int __exit amiga_gayle_ide_remove(struct platform_device *pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) 	struct ide_host *host = platform_get_drvdata(pdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) 	struct resource *res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) 	ide_host_remove(host);
^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 0;
^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 struct platform_driver amiga_gayle_ide_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) 	.remove = __exit_p(amiga_gayle_ide_remove),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) 	.driver   = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) 		.name	= "amiga-gayle-ide",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) 	},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) module_platform_driver_probe(amiga_gayle_ide_driver, amiga_gayle_ide_probe);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) MODULE_LICENSE("GPL");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) MODULE_ALIAS("platform:amiga-gayle-ide");