1 // SPDX-License-Identifier: GPL-2.0+
14 #include <linux/bitops.h>
16 #include "mpc83xx_cpu.h"
19 * struct mpc83xx_cpu_priv - Private data for MPC83xx CPUs
20 * @e300_type: The e300 core type of the MPC83xx CPU
21 * @family: The MPC83xx family the CPU belongs to
22 * @type: The MPC83xx type of the CPU
23 * @is_e_processor: Flag indicating whether the CPU is a E processor or not
24 * @is_a_variant: Flag indicating whtther the CPU is a A variant or not
25 * @revid: The revision ID of the CPU
26 * @revid.major: The major part of the CPU's revision ID
27 * @revid.minor: The minor part of the CPU's revision ID
29 struct mpc83xx_cpu_priv {
30 enum e300_type e300_type;
31 enum mpc83xx_cpu_family family;
32 enum mpc83xx_cpu_type type;
43 /* Activate all CPUs from board_f.c */
44 return cpu_probe_all();
48 * get_spridr() - Read SPRIDR (System Part and Revision ID Register) of CPU
50 * Return: The SPRIDR value
52 static inline u32 get_spridr(void)
54 immap_t *immr = (immap_t *)CONFIG_SYS_IMMR;
56 return in_be32(&immr->sysconf.spridr);
60 * determine_type() - Determine CPU family of MPC83xx device
61 * @dev: CPU device from which to read CPU family from
63 static inline void determine_family(struct udevice *dev)
65 struct mpc83xx_cpu_priv *priv = dev_get_priv(dev);
66 /* Upper 12 bits of PARTID field (bits 0-23 in SPRIDR) */
67 const u32 PARTID_FAMILY_MASK = 0xFFF00000;
69 switch (bitfield_extract_by_mask(get_spridr(), PARTID_FAMILY_MASK)) {
72 priv->family = FAMILY_830X;
75 priv->family = FAMILY_831X;
78 priv->family = FAMILY_832X;
81 priv->family = FAMILY_834X;
84 priv->family = FAMILY_836X;
87 priv->family = FAMILY_837X;
90 priv->family = FAMILY_UNKNOWN;
95 * determine_type() - Determine CPU type of MPC83xx device
96 * @dev: CPU device from which to read CPU type from
98 static inline void determine_type(struct udevice *dev)
100 struct mpc83xx_cpu_priv *priv = dev_get_priv(dev);
101 /* Upper 16 bits of PVR (Processor Version Register) */
102 const u32 PCR_UPPER_MASK = 0xFFFF0000;
105 val = bitfield_extract_by_mask(get_spridr(), PCR_UPPER_MASK);
107 /* Mask out E-variant bit */
108 switch (val & 0xFFFE) {
110 priv->type = TYPE_8308;
113 priv->type = TYPE_8309;
116 priv->type = TYPE_8311;
119 priv->type = TYPE_8313;
122 priv->type = TYPE_8314;
125 priv->type = TYPE_8315;
128 priv->type = TYPE_8321;
131 priv->type = TYPE_8323;
134 priv->type = TYPE_8343;
137 priv->type = TYPE_8347_TBGA;
140 priv->type = TYPE_8347_PBGA;
143 priv->type = TYPE_8349;
146 priv->type = TYPE_8358_TBGA;
149 priv->type = TYPE_8358_PBGA;
152 priv->type = TYPE_8360;
155 priv->type = TYPE_8377;
158 priv->type = TYPE_8378;
161 priv->type = TYPE_8379;
164 priv->type = TYPE_UNKNOWN;
169 * determine_e300_type() - Determine e300 core type of MPC83xx device
170 * @dev: CPU device from which to read e300 core type from
172 static inline void determine_e300_type(struct udevice *dev)
174 struct mpc83xx_cpu_priv *priv = dev_get_priv(dev);
175 /* Upper 16 bits of PVR (Processor Version Register) */
176 const u32 PCR_UPPER_MASK = 0xFFFF0000;
179 switch ((pvr & PCR_UPPER_MASK) >> 16) {
181 priv->e300_type = E300C1;
184 priv->e300_type = E300C2;
187 priv->e300_type = E300C3;
190 priv->e300_type = E300C4;
193 priv->e300_type = E300_UNKNOWN;
198 * determine_revid() - Determine revision ID of CPU device
199 * @dev: CPU device from which to read revision ID
201 static inline void determine_revid(struct udevice *dev)
203 struct mpc83xx_cpu_priv *priv = dev_get_priv(dev);
204 u32 REVID_MAJOR_MASK;
205 u32 REVID_MINOR_MASK;
206 u32 spridr = get_spridr();
208 if (priv->family == FAMILY_834X) {
209 REVID_MAJOR_MASK = 0x0000FF00;
210 REVID_MINOR_MASK = 0x000000FF;
212 REVID_MAJOR_MASK = 0x000000F0;
213 REVID_MINOR_MASK = 0x0000000F;
216 priv->revid.major = bitfield_extract_by_mask(spridr, REVID_MAJOR_MASK);
217 priv->revid.minor = bitfield_extract_by_mask(spridr, REVID_MINOR_MASK);
221 * determine_cpu_data() - Determine CPU information from hardware
222 * @dev: CPU device from which to read information
224 static void determine_cpu_data(struct udevice *dev)
226 struct mpc83xx_cpu_priv *priv = dev_get_priv(dev);
227 const u32 E_FLAG_MASK = 0x00010000;
228 u32 spridr = get_spridr();
230 determine_family(dev);
232 determine_e300_type(dev);
233 determine_revid(dev);
235 if ((priv->family == FAMILY_834X ||
236 priv->family == FAMILY_836X) && priv->revid.major >= 2)
237 priv->is_a_variant = true;
239 priv->is_e_processor = !bitfield_extract_by_mask(spridr, E_FLAG_MASK);
242 static int mpc83xx_cpu_get_desc(struct udevice *dev, char *buf, int size)
244 struct mpc83xx_cpu_priv *priv = dev_get_priv(dev);
251 ret = clk_get_by_index(dev, 0, &core_clk);
253 debug("%s: Failed to get core clock (err = %d)\n",
258 ret = clk_get_by_index(dev, 1, &csb_clk);
260 debug("%s: Failed to get CSB clock (err = %d)\n",
265 determine_cpu_data(dev);
268 "%s, MPC%s%s%s, Rev: %d.%d at %s MHz, CSB: %s MHz",
269 e300_names[priv->e300_type],
270 cpu_type_names[priv->type],
271 priv->is_e_processor ? "E" : "",
272 priv->is_a_variant ? "A" : "",
275 strmhz(core_freq, clk_get_rate(&core_clk)),
276 strmhz(csb_freq, clk_get_rate(&csb_clk)));
281 static int mpc83xx_cpu_get_info(struct udevice *dev, struct cpu_info *info)
287 ret = clk_get_by_index(dev, 0, &clock);
289 debug("%s: Failed to get core clock (err = %d)\n",
294 freq = clk_get_rate(&clock);
296 debug("%s: Core clock speed is zero\n", dev->name);
300 info->cpu_freq = freq;
301 info->features = BIT(CPU_FEAT_L1_CACHE) | BIT(CPU_FEAT_MMU);
306 static int mpc83xx_cpu_get_count(struct udevice *dev)
308 /* We have one e300cX core */
312 static int mpc83xx_cpu_get_vendor(struct udevice *dev, char *buf, int size)
314 snprintf(buf, size, "NXP");
319 static const struct cpu_ops mpc83xx_cpu_ops = {
320 .get_desc = mpc83xx_cpu_get_desc,
321 .get_info = mpc83xx_cpu_get_info,
322 .get_count = mpc83xx_cpu_get_count,
323 .get_vendor = mpc83xx_cpu_get_vendor,
326 static int mpc83xx_cpu_probe(struct udevice *dev)
331 static const struct udevice_id mpc83xx_cpu_ids[] = {
332 { .compatible = "fsl,mpc83xx", },
333 { .compatible = "fsl,mpc8308", },
334 { .compatible = "fsl,mpc8309", },
335 { .compatible = "fsl,mpc8313", },
336 { .compatible = "fsl,mpc8315", },
337 { .compatible = "fsl,mpc832x", },
338 { .compatible = "fsl,mpc8349", },
339 { .compatible = "fsl,mpc8360", },
340 { .compatible = "fsl,mpc8379", },
344 U_BOOT_DRIVER(mpc83xx_cpu) = {
345 .name = "mpc83xx_cpu",
347 .of_match = mpc83xx_cpu_ids,
348 .probe = mpc83xx_cpu_probe,
349 .priv_auto_alloc_size = sizeof(struct mpc83xx_cpu_priv),
350 .ops = &mpc83xx_cpu_ops,
351 .flags = DM_FLAG_PRE_RELOC,