1 // SPDX-License-Identifier: GPL-2.0-only
3  * PISMO memory driver - http://www.pismoworld.org/
15 #include <linux/mtd/plat-ram.h>
22 	u8	width;  member
39 	u8	width;  member
52 	struct i2c_client *client = to_i2c_client(pdev->dev.parent);  in pismo_set_vpp()
55 	pismo->vpp(pismo->vpp_data, on);  in pismo_set_vpp()
58 static unsigned int pismo_width_to_bytes(unsigned int width)  in pismo_width_to_bytes()  argument
60 	width &= 15;  in pismo_width_to_bytes()
61 	if (width > 2)  in pismo_width_to_bytes()
63 	return 1 << width;  in pismo_width_to_bytes()
72 			.addr = client->addr,  in pismo_eeprom_read()
76 			.addr = client->addr,  in pismo_eeprom_read()
83 	ret = i2c_transfer(client->adapter, msg, ARRAY_SIZE(msg));  in pismo_eeprom_read()
85 	return ret == ARRAY_SIZE(msg) ? size : -EIO;  in pismo_eeprom_read()
94 	phys_addr_t base = region->base;  in pismo_add_device()
98 		return -ENXIO;  in pismo_add_device()
101 	res.end = base + region->size - 1;  in pismo_add_device()
106 		return -ENOMEM;  in pismo_add_device()
107 	dev->dev.parent = &pismo->client->dev;  in pismo_add_device()
122 		pismo->dev[i] = dev;  in pismo_add_device()
133 	struct physmap_flash_data data = {  in pismo_add_nor()  local
134 		.width = region->width,  in pismo_add_nor()
137 	if (pismo->vpp)  in pismo_add_nor()
138 		data.set_vpp = pismo_set_vpp;  in pismo_add_nor()
140 	return pismo_add_device(pismo, i, region, "physmap-flash",  in pismo_add_nor()
141 		&data, sizeof(data));  in pismo_add_nor()
147 	struct platdata_mtd_ram data = {  in pismo_add_sram()  local
148 		.bankwidth = region->width,  in pismo_add_sram()
151 	return pismo_add_device(pismo, i, region, "mtd-ram",  in pismo_add_sram()
152 		&data, sizeof(data));  in pismo_add_sram()
158 	struct device *dev = &pismo->client->dev;  in pismo_add_one()
162 	region.type = cs->type;  in pismo_add_one()
163 	region.width = pismo_width_to_bytes(cs->width);  in pismo_add_one()
164 	region.access = le16_to_cpu(cs->access);  in pismo_add_one()
165 	region.size = le32_to_cpu(cs->size);  in pismo_add_one()
167 	if (region.width == 0) {  in pismo_add_one()
168 		dev_err(dev, "cs%u: bad width: %02x, ignoring\n", i, cs->width);  in pismo_add_one()
179 		i, cs->device, region.type, region.access, region.size / 1024);  in pismo_add_one()
203 	for (i = 0; i < ARRAY_SIZE(pismo->dev); i++)  in pismo_remove()
204 		platform_device_unregister(pismo->dev[i]);  in pismo_remove()
211 	struct pismo_pdata *pdata = client->dev.platform_data;  in pismo_probe()
216 	if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {  in pismo_probe()
217 		dev_err(&client->dev, "functionality mismatch\n");  in pismo_probe()
218 		return -EIO;  in pismo_probe()
223 		return -ENOMEM;  in pismo_probe()
225 	pismo->client = client;  in pismo_probe()
227 		pismo->vpp = pdata->set_vpp;  in pismo_probe()
228 		pismo->vpp_data = pdata->vpp_data;  in pismo_probe()
234 		dev_err(&client->dev, "error reading EEPROM: %d\n", ret);  in pismo_probe()
238 	dev_info(&client->dev, "%.15s board found\n", eeprom.board);  in pismo_probe()
243 				      pdata->cs_addrs[i]);  in pismo_probe()