Lines Matching +full:bank +full:- +full:width
1 // SPDX-License-Identifier: GPL-2.0-only
6 * Author: Alex Smith <alex@alex-smith.me.uk>
21 #include <linux/jz4780-nemc.h>
23 #define NEMC_SMCRn(n) (0x14 + (((n) - 1) * 4))
43 #define NEMC_NFCSR_NFEn(n) BIT(((n) - 1) << 1)
44 #define NEMC_NFCSR_NFCEn(n) BIT((((n) - 1) << 1) + 1)
45 #define NEMC_NFCSR_TNFEn(n) BIT(16 + (n) - 1)
62 * jz4780_nemc_num_banks() - count the number of banks referenced by a device
66 * child device. Unique here means that a device that references the same bank
72 unsigned int bank, count = 0; in jz4780_nemc_num_banks() local
76 while ((prop = of_get_address(dev->of_node, i++, NULL, NULL))) { in jz4780_nemc_num_banks()
77 bank = of_read_number(prop, 1); in jz4780_nemc_num_banks()
78 if (!(referenced & BIT(bank))) { in jz4780_nemc_num_banks()
79 referenced |= BIT(bank); in jz4780_nemc_num_banks()
89 * jz4780_nemc_set_type() - set the type of device connected to a bank
91 * @bank: bank number to configure.
92 * @type: type of device connected to the bank.
94 void jz4780_nemc_set_type(struct device *dev, unsigned int bank, in jz4780_nemc_set_type() argument
97 struct jz4780_nemc *nemc = dev_get_drvdata(dev->parent); in jz4780_nemc_set_type()
100 nfcsr = readl(nemc->base + NEMC_NFCSR); in jz4780_nemc_set_type()
105 nfcsr &= ~(NEMC_NFCSR_TNFEn(bank) | NEMC_NFCSR_NFEn(bank)); in jz4780_nemc_set_type()
108 nfcsr &= ~NEMC_NFCSR_TNFEn(bank); in jz4780_nemc_set_type()
109 nfcsr |= NEMC_NFCSR_NFEn(bank); in jz4780_nemc_set_type()
113 writel(nfcsr, nemc->base + NEMC_NFCSR); in jz4780_nemc_set_type()
118 * jz4780_nemc_assert() - (de-)assert a NAND device's chip enable pin
120 * @bank: bank number of device.
123 * (De-)asserts the chip enable pin for the NAND device connected to the
124 * specified bank.
126 void jz4780_nemc_assert(struct device *dev, unsigned int bank, bool assert) in jz4780_nemc_assert() argument
128 struct jz4780_nemc *nemc = dev_get_drvdata(dev->parent); in jz4780_nemc_assert()
131 nfcsr = readl(nemc->base + NEMC_NFCSR); in jz4780_nemc_assert()
134 nfcsr |= NEMC_NFCSR_NFCEn(bank); in jz4780_nemc_assert()
136 nfcsr &= ~NEMC_NFCSR_NFCEn(bank); in jz4780_nemc_assert()
138 writel(nfcsr, nemc->base + NEMC_NFCSR); in jz4780_nemc_assert()
146 rate = clk_get_rate(nemc->clk); in jz4780_nemc_clk_period()
156 return ((ns * 1000) + nemc->clk_period - 1) / nemc->clk_period; in jz4780_nemc_ns_to_cycles()
160 unsigned int bank, in jz4780_nemc_configure_bank() argument
172 /* 11 - 12 -> 12 cycles */ in jz4780_nemc_configure_bank()
175 /* 13 - 15 -> 15 cycles */ in jz4780_nemc_configure_bank()
178 /* 16 - 20 -> 20 cycles */ in jz4780_nemc_configure_bank()
181 /* 21 - 25 -> 25 cycles */ in jz4780_nemc_configure_bank()
184 /* 26 - 31 -> 31 cycles */ in jz4780_nemc_configure_bank()
188 smcr = readl(nemc->base + NEMC_SMCRn(bank)); in jz4780_nemc_configure_bank()
191 if (!of_property_read_u32(node, "ingenic,nemc-bus-width", &val)) { in jz4780_nemc_configure_bank()
199 * Earlier SoCs support a 16 bit bus width (the 4780 in jz4780_nemc_configure_bank()
202 dev_err(nemc->dev, "unsupported bus width: %u\n", val); in jz4780_nemc_configure_bank()
207 if (of_property_read_u32(node, "ingenic,nemc-tAS", &val) == 0) { in jz4780_nemc_configure_bank()
210 if (cycles > nemc->soc_info->tas_tah_cycles_max) { in jz4780_nemc_configure_bank()
211 dev_err(nemc->dev, "tAS %u is too high (%u cycles)\n", in jz4780_nemc_configure_bank()
219 if (of_property_read_u32(node, "ingenic,nemc-tAH", &val) == 0) { in jz4780_nemc_configure_bank()
222 if (cycles > nemc->soc_info->tas_tah_cycles_max) { in jz4780_nemc_configure_bank()
223 dev_err(nemc->dev, "tAH %u is too high (%u cycles)\n", in jz4780_nemc_configure_bank()
231 if (of_property_read_u32(node, "ingenic,nemc-tBP", &val) == 0) { in jz4780_nemc_configure_bank()
235 dev_err(nemc->dev, "tBP %u is too high (%u cycles)\n", in jz4780_nemc_configure_bank()
243 if (of_property_read_u32(node, "ingenic,nemc-tAW", &val) == 0) { in jz4780_nemc_configure_bank()
247 dev_err(nemc->dev, "tAW %u is too high (%u cycles)\n", in jz4780_nemc_configure_bank()
255 if (of_property_read_u32(node, "ingenic,nemc-tSTRV", &val) == 0) { in jz4780_nemc_configure_bank()
259 dev_err(nemc->dev, "tSTRV %u is too high (%u cycles)\n", in jz4780_nemc_configure_bank()
267 writel(smcr, nemc->base + NEMC_SMCRn(bank)); in jz4780_nemc_configure_bank()
273 struct device *dev = &pdev->dev; in jz4780_nemc_probe()
278 unsigned int bank; in jz4780_nemc_probe() local
284 return -ENOMEM; in jz4780_nemc_probe()
286 nemc->soc_info = device_get_match_data(dev); in jz4780_nemc_probe()
287 if (!nemc->soc_info) in jz4780_nemc_probe()
288 return -EINVAL; in jz4780_nemc_probe()
290 spin_lock_init(&nemc->lock); in jz4780_nemc_probe()
291 nemc->dev = dev; in jz4780_nemc_probe()
301 if (!devm_request_mem_region(dev, res->start, NEMC_REG_LEN, dev_name(dev))) { in jz4780_nemc_probe()
303 return -EBUSY; in jz4780_nemc_probe()
306 nemc->base = devm_ioremap(dev, res->start, NEMC_REG_LEN); in jz4780_nemc_probe()
307 if (IS_ERR(nemc->base)) { in jz4780_nemc_probe()
309 return PTR_ERR(nemc->base); in jz4780_nemc_probe()
312 writel(0, nemc->base + NEMC_NFCSR); in jz4780_nemc_probe()
314 nemc->clk = devm_clk_get(dev, NULL); in jz4780_nemc_probe()
315 if (IS_ERR(nemc->clk)) { in jz4780_nemc_probe()
317 return PTR_ERR(nemc->clk); in jz4780_nemc_probe()
320 ret = clk_prepare_enable(nemc->clk); in jz4780_nemc_probe()
326 nemc->clk_period = jz4780_nemc_clk_period(nemc); in jz4780_nemc_probe()
327 if (!nemc->clk_period) { in jz4780_nemc_probe()
329 clk_disable_unprepare(nemc->clk); in jz4780_nemc_probe()
330 return -EINVAL; in jz4780_nemc_probe()
339 for_each_child_of_node(nemc->dev->of_node, child) { in jz4780_nemc_probe()
343 bank = of_read_number(prop, 1); in jz4780_nemc_probe()
344 if (bank < 1 || bank >= JZ4780_NEMC_NUM_BANKS) { in jz4780_nemc_probe()
345 dev_err(nemc->dev, in jz4780_nemc_probe()
346 "%pOF requests invalid bank %u\n", in jz4780_nemc_probe()
347 child, bank); in jz4780_nemc_probe()
354 referenced |= BIT(bank); in jz4780_nemc_probe()
358 dev_err(nemc->dev, "%pOF has no addresses\n", in jz4780_nemc_probe()
361 } else if (nemc->banks_present & referenced) { in jz4780_nemc_probe()
362 dev_err(nemc->dev, "%pOF conflicts with another node\n", in jz4780_nemc_probe()
367 /* Configure bank parameters. */ in jz4780_nemc_probe()
368 for_each_set_bit(bank, &referenced, JZ4780_NEMC_NUM_BANKS) { in jz4780_nemc_probe()
369 if (!jz4780_nemc_configure_bank(nemc, bank, child)) { in jz4780_nemc_probe()
376 if (of_platform_device_create(child, NULL, nemc->dev)) in jz4780_nemc_probe()
377 nemc->banks_present |= referenced; in jz4780_nemc_probe()
390 clk_disable_unprepare(nemc->clk); in jz4780_nemc_remove()
403 { .compatible = "ingenic,jz4740-nemc", .data = &jz4740_soc_info, },
404 { .compatible = "ingenic,jz4780-nemc", .data = &jz4780_soc_info, },
412 .name = "jz4780-nemc",