Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   1) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   2)  * TX4938 internal IDE driver
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   3)  * Based on tx4939ide.c.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   4)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   5)  * This file is subject to the terms and conditions of the GNU General Public
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   6)  * License.  See the file "COPYING" in the main directory of this archive
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   7)  * for more details.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   8)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   9)  * (C) Copyright TOSHIBA CORPORATION 2005-2007
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  10)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  11) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  12) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  13) #include <linux/types.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  14) #include <linux/ide.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  15) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  16) #include <linux/platform_device.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) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  19) #include <asm/ide.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  20) #include <asm/txx9/tx4938.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  21) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22) static void tx4938ide_tune_ebusc(unsigned int ebus_ch,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23) 				 unsigned int gbus_clock,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  24) 				 u8 pio)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  25) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  26) 	struct ide_timing *t = ide_timing_find_mode(XFER_PIO_0 + pio);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27) 	u64 cr = __raw_readq(&tx4938_ebuscptr->cr[ebus_ch]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28) 	unsigned int sp = (cr >> 4) & 3;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29) 	unsigned int clock = gbus_clock / (4 - sp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30) 	unsigned int cycle = 1000000000 / clock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  31) 	unsigned int shwt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32) 	int wt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34) 	/* Minimum DIOx- active time */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35) 	wt = DIV_ROUND_UP(t->act8b, cycle) - 2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36) 	/* IORDY setup time: 35ns */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37) 	wt = max_t(int, wt, DIV_ROUND_UP(35, cycle));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  38) 	/* actual wait-cycle is max(wt & ~1, 1) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  39) 	if (wt > 2 && (wt & 1))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  40) 		wt++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41) 	wt &= ~1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42) 	/* Address-valid to DIOR/DIOW setup */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43) 	shwt = DIV_ROUND_UP(t->setup, cycle);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45) 	/* -DIOx recovery time (SHWT * 4) and cycle time requirement */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46) 	while ((shwt * 4 + wt + (wt ? 2 : 3)) * cycle < t->cycle)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  47) 		shwt++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  48) 	if (shwt > 7) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49) 		pr_warn("tx4938ide: SHWT violation (%d)\n", shwt);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50) 		shwt = 7;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52) 	pr_debug("tx4938ide: ebus %d, bus cycle %dns, WT %d, SHWT %d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53) 		 ebus_ch, cycle, wt, shwt);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55) 	__raw_writeq((cr & ~0x3f007ull) | (wt << 12) | shwt,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  56) 		     &tx4938_ebuscptr->cr[ebus_ch]);
^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) static void tx4938ide_set_pio_mode(ide_hwif_t *hwif, ide_drive_t *drive)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  60) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61) 	struct tx4938ide_platform_info *pdata = dev_get_platdata(hwif->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62) 	u8 safe = drive->pio_mode - XFER_PIO_0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63) 	ide_drive_t *pair;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65) 	pair = ide_get_pair_dev(drive);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66) 	if (pair)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67) 		safe = min_t(u8, safe, pair->pio_mode - XFER_PIO_0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68) 	tx4938ide_tune_ebusc(pdata->ebus_ch, pdata->gbus_clock, safe);
^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) #ifdef __BIG_ENDIAN
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  72) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  73) /* custom iops (independent from SWAP_IO_SPACE) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  74) static void tx4938ide_input_data_swap(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 port = drive->hwif->io_ports.data_addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78) 	unsigned short *ptr = buf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79) 	unsigned int count = (len + 1) / 2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81) 	while (count--)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82) 		*ptr++ = cpu_to_le16(__raw_readw((void __iomem *)port));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83) 	__ide_flush_dcache_range((unsigned long)buf, roundup(len, 2));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86) static void tx4938ide_output_data_swap(ide_drive_t *drive, struct ide_cmd *cmd,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87) 				void *buf, unsigned int len)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89) 	unsigned long port = drive->hwif->io_ports.data_addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90) 	unsigned short *ptr = buf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91) 	unsigned int count = (len + 1) / 2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93) 	while (count--) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94) 		__raw_writew(le16_to_cpu(*ptr), (void __iomem *)port);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95) 		ptr++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97) 	__ide_flush_dcache_range((unsigned long)buf, roundup(len, 2));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  98) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  99) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) static const struct ide_tp_ops tx4938ide_tp_ops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) 	.exec_command		= ide_exec_command,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) 	.read_status		= ide_read_status,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) 	.read_altstatus		= ide_read_altstatus,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) 	.write_devctl		= ide_write_devctl,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) 	.dev_select		= ide_dev_select,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) 	.tf_load		= ide_tf_load,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) 	.tf_read		= ide_tf_read,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) 	.input_data		= tx4938ide_input_data_swap,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) 	.output_data		= tx4938ide_output_data_swap,
^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) #endif	/* __BIG_ENDIAN */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) static const struct ide_port_ops tx4938ide_port_ops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) 	.set_pio_mode		= tx4938ide_set_pio_mode,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) static const struct ide_port_info tx4938ide_port_info __initconst = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) 	.port_ops		= &tx4938ide_port_ops,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) #ifdef __BIG_ENDIAN
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) 	.tp_ops			= &tx4938ide_tp_ops,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) 	.host_flags		= IDE_HFLAG_MMIO | IDE_HFLAG_NO_DMA,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) 	.pio_mask		= ATA_PIO5,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) 	.chipset		= ide_generic,
^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) static int __init tx4938ide_probe(struct platform_device *pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) 	struct ide_hw hw, *hws[] = { &hw };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) 	struct ide_host *host;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) 	struct resource *res;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) 	struct tx4938ide_platform_info *pdata = dev_get_platdata(&pdev->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) 	int irq, ret, i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) 	unsigned long mapbase, mapctl;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) 	struct ide_port_info d = tx4938ide_port_info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) 	irq = platform_get_irq(pdev, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) 	if (irq < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) 		return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) 	if (!res)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) 		return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) 	if (!devm_request_mem_region(&pdev->dev, res->start,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) 				     resource_size(res), "tx4938ide"))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) 		return -EBUSY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) 	mapbase = (unsigned long)devm_ioremap(&pdev->dev, res->start,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) 					      8 << pdata->ioport_shift);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) 	mapctl = (unsigned long)devm_ioremap(&pdev->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) 					     res->start + 0x10000 +
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) 					     (6 << pdata->ioport_shift),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) 					     1 << pdata->ioport_shift);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) 	if (!mapbase || !mapctl)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) 		return -EBUSY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) 	memset(&hw, 0, sizeof(hw));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) 	if (pdata->ioport_shift) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) 		unsigned long port = mapbase;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) 		unsigned long ctl = mapctl;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) 		hw.io_ports_array[0] = port;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) #ifdef __BIG_ENDIAN
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) 		port++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) 		ctl++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) 		for (i = 1; i <= 7; i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) 			hw.io_ports_array[i] =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) 				port + (i << pdata->ioport_shift);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) 		hw.io_ports.ctl_addr = ctl;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) 	} else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) 		ide_std_init_ports(&hw, mapbase, mapctl);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) 	hw.irq = irq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) 	hw.dev = &pdev->dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) 	pr_info("TX4938 IDE interface (base %#lx, ctl %#lx, irq %d)\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) 		mapbase, mapctl, hw.irq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) 	if (pdata->gbus_clock)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) 		tx4938ide_tune_ebusc(pdata->ebus_ch, pdata->gbus_clock, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) 	else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) 		d.port_ops = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) 	ret = ide_host_add(&d, hws, 1, &host);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) 	if (!ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) 		platform_set_drvdata(pdev, host);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) 	return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) static int __exit tx4938ide_remove(struct platform_device *pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) 	struct ide_host *host = platform_get_drvdata(pdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) 	ide_host_remove(host);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) static struct platform_driver tx4938ide_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) 	.driver		= {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) 		.name	= "tx4938ide",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) 	},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) 	.remove = __exit_p(tx4938ide_remove),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) module_platform_driver_probe(tx4938ide_driver, tx4938ide_probe);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) MODULE_DESCRIPTION("TX4938 internal IDE driver");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) MODULE_LICENSE("GPL");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) MODULE_ALIAS("platform:tx4938ide");