Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   1) // SPDX-License-Identifier: GPL-2.0-only
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   3)  * Flash memory access on SA11x0 based devices
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   4)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   5)  * (C) 2000 Nicolas Pitre <nico@fluxnic.net>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   6)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   7) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   8) #include <linux/types.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   9) #include <linux/ioport.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  10) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  11) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  12) #include <linux/errno.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  13) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  14) #include <linux/platform_device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  15) #include <linux/err.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  16) #include <linux/io.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  17) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  18) #include <linux/mtd/mtd.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  19) #include <linux/mtd/map.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  20) #include <linux/mtd/partitions.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  21) #include <linux/mtd/concat.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23) #include <mach/hardware.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  24) #include <linux/sizes.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  25) #include <asm/mach/flash.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  26) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27) struct sa_subdev_info {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28) 	char name[16];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29) 	struct map_info map;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30) 	struct mtd_info *mtd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  31) 	struct flash_platform_data *plat;
^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) struct sa_info {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35) 	struct mtd_info		*mtd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36) 	int			num_subdev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37) 	struct sa_subdev_info	subdev[];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  38) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  39) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  40) static DEFINE_SPINLOCK(sa1100_vpp_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41) static int sa1100_vpp_refcnt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42) static void sa1100_set_vpp(struct map_info *map, int on)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44) 	struct sa_subdev_info *subdev = container_of(map, struct sa_subdev_info, map);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45) 	unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  47) 	spin_lock_irqsave(&sa1100_vpp_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  48) 	if (on) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49) 		if (++sa1100_vpp_refcnt == 1)   /* first nested 'on' */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50) 			subdev->plat->set_vpp(1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51) 	} else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52) 		if (--sa1100_vpp_refcnt == 0)   /* last nested 'off' */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53) 			subdev->plat->set_vpp(0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55) 	spin_unlock_irqrestore(&sa1100_vpp_lock, flags);
^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) static void sa1100_destroy_subdev(struct sa_subdev_info *subdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  59) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  60) 	if (subdev->mtd)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61) 		map_destroy(subdev->mtd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62) 	if (subdev->map.virt)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63) 		iounmap(subdev->map.virt);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64) 	release_mem_region(subdev->map.phys, subdev->map.size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67) static int sa1100_probe_subdev(struct sa_subdev_info *subdev, struct resource *res)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  69) 	unsigned long phys;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  70) 	unsigned int size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  71) 	int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  72) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  73) 	phys = res->start;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  74) 	size = res->end - phys + 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  75) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  76) 	/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  77) 	 * Retrieve the bankwidth from the MSC registers.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78) 	 * We currently only implement CS0 and CS1 here.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80) 	switch (phys) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81) 	default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82) 		printk(KERN_WARNING "SA1100 flash: unknown base address "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83) 		       "0x%08lx, assuming CS0\n", phys);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84) 		fallthrough;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85) 	case SA1100_CS0_PHYS:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86) 		subdev->map.bankwidth = (MSC0 & MSC_RBW) ? 2 : 4;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89) 	case SA1100_CS1_PHYS:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90) 		subdev->map.bankwidth = ((MSC0 >> 16) & MSC_RBW) ? 2 : 4;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94) 	if (!request_mem_region(phys, size, subdev->name)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95) 		ret = -EBUSY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96) 		goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  98) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  99) 	if (subdev->plat->set_vpp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) 		subdev->map.set_vpp = sa1100_set_vpp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) 	subdev->map.phys = phys;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) 	subdev->map.size = size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) 	subdev->map.virt = ioremap(phys, size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) 	if (!subdev->map.virt) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) 		ret = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) 		goto err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) 	simple_map_init(&subdev->map);
^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) 	 * Now let's probe for the actual flash.  Do it here since
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) 	 * specific machine settings might have been set above.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) 	subdev->mtd = do_map_probe(subdev->plat->map_name, &subdev->map);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) 	if (subdev->mtd == NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) 		ret = -ENXIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) 		goto err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) 	printk(KERN_INFO "SA1100 flash: CFI device at 0x%08lx, %uMiB, %d-bit\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) 		phys, (unsigned)(subdev->mtd->size >> 20),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) 		subdev->map.bankwidth * 8);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128)  err:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) 	sa1100_destroy_subdev(subdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130)  out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) 	return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) static void sa1100_destroy(struct sa_info *info, struct flash_platform_data *plat)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) 	int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) 	if (info->mtd) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) 		mtd_device_unregister(info->mtd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) 		if (info->mtd != info->subdev[0].mtd)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) 			mtd_concat_destroy(info->mtd);
^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) 	for (i = info->num_subdev - 1; i >= 0; i--)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) 		sa1100_destroy_subdev(&info->subdev[i]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) 	kfree(info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) 	if (plat->exit)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) 		plat->exit();
^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) static struct sa_info *sa1100_setup_mtd(struct platform_device *pdev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) 					struct flash_platform_data *plat)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) 	struct sa_info *info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) 	int nr, size, i, ret = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) 	/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) 	 * Count number of devices.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) 	for (nr = 0; ; nr++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) 		if (!platform_get_resource(pdev, IORESOURCE_MEM, nr))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) 			break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) 	if (nr == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) 		ret = -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) 		goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) 	size = sizeof(struct sa_info) + sizeof(struct sa_subdev_info) * nr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) 	/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) 	 * Allocate the map_info structs in one go.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) 	info = kzalloc(size, GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) 	if (!info) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) 		ret = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) 		goto out;
^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) 	if (plat->init) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) 		ret = plat->init();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) 		if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) 			goto err;
^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) 	/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) 	 * Claim and then map the memory regions.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) 	for (i = 0; i < nr; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) 		struct sa_subdev_info *subdev = &info->subdev[i];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) 		struct resource *res;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) 		res = platform_get_resource(pdev, IORESOURCE_MEM, i);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) 		if (!res)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) 			break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) 		subdev->map.name = subdev->name;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) 		sprintf(subdev->name, "%s-%d", plat->name, i);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) 		subdev->plat = plat;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) 		ret = sa1100_probe_subdev(subdev, res);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) 		if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) 			break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) 	info->num_subdev = i;
^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) 	 * ENXIO is special.  It means we didn't find a chip when we probed.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) 	if (ret != 0 && !(ret == -ENXIO && info->num_subdev > 0))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) 		goto err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) 	/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) 	 * If we found one device, don't bother with concat support.  If
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) 	 * we found multiple devices, use concat if we have it available,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) 	 * otherwise fail.  Either way, it'll be called "sa1100".
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) 	if (info->num_subdev == 1) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) 		strcpy(info->subdev[0].name, plat->name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) 		info->mtd = info->subdev[0].mtd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) 		ret = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) 	} else if (info->num_subdev > 1) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) 		struct mtd_info **cdev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) 		cdev = kmalloc_array(nr, sizeof(*cdev), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) 		if (!cdev) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) 			ret = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) 			goto err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) 		/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) 		 * We detected multiple devices.  Concatenate them together.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) 		 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) 		for (i = 0; i < info->num_subdev; i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) 			cdev[i] = info->subdev[i].mtd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) 		info->mtd = mtd_concat_create(cdev, info->num_subdev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) 					      plat->name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) 		kfree(cdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) 		if (info->mtd == NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) 			ret = -ENXIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) 			goto err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) 	info->mtd->dev.parent = &pdev->dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) 	if (ret == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) 		return info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252)  err:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) 	sa1100_destroy(info, plat);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254)  out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) 	return ERR_PTR(ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) static const char * const part_probes[] = { "cmdlinepart", "RedBoot", NULL };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) static int sa1100_mtd_probe(struct platform_device *pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) 	struct flash_platform_data *plat = dev_get_platdata(&pdev->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) 	struct sa_info *info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) 	int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) 	if (!plat)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) 		return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) 	info = sa1100_setup_mtd(pdev, plat);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) 	if (IS_ERR(info)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) 		err = PTR_ERR(info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) 		goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) 	/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) 	 * Partition selection stuff.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) 	mtd_device_parse_register(info->mtd, part_probes, NULL, plat->parts,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) 				  plat->nr_parts);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) 	platform_set_drvdata(pdev, info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) 	err = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284)  out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) 	return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) static int sa1100_mtd_remove(struct platform_device *pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) 	struct sa_info *info = platform_get_drvdata(pdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) 	struct flash_platform_data *plat = dev_get_platdata(&pdev->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) 	sa1100_destroy(info, plat);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) 	return 0;
^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) static struct platform_driver sa1100_mtd_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) 	.probe		= sa1100_mtd_probe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) 	.remove		= sa1100_mtd_remove,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) 	.driver		= {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) 		.name	= "sa1100-mtd",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) 	},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) module_platform_driver(sa1100_mtd_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) MODULE_AUTHOR("Nicolas Pitre");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) MODULE_DESCRIPTION("SA1100 CFI map driver");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) MODULE_LICENSE("GPL");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) MODULE_ALIAS("platform:sa1100-mtd");