1 // SPDX-License-Identifier: GPL-2.0+
4 * Mario Six, Guntermann & Drunck GmbH, mario.six@gdsys.cc
13 #include "mpc83xx_cpu.h"
16 * struct mpc83xx_cpu_priv - Private data for MPC83xx CPUs
17 * @e300_type: The e300 core type of the MPC83xx CPU
18 * @family: The MPC83xx family the CPU belongs to
19 * @type: The MPC83xx type of the CPU
20 * @is_e_processor: Flag indicating whether the CPU is a E processor or not
21 * @is_a_variant: Flag indicating whtther the CPU is a A variant or not
22 * @revid: The revision ID of the CPU
23 * @revid.major: The major part of the CPU's revision ID
24 * @revid.minor: The minor part of the CPU's revision ID
26 struct mpc83xx_cpu_priv {
27 enum e300_type e300_type;
28 enum mpc83xx_cpu_family family;
29 enum mpc83xx_cpu_type type;
40 /* Activate all CPUs from board_f.c */
41 return cpu_probe_all();
45 * get_spridr() - Read SPRIDR (System Part and Revision ID Register) of CPU
47 * Return: The SPRIDR value
49 static inline u32 get_spridr(void)
51 immap_t *immr = (immap_t *)CONFIG_SYS_IMMR;
53 return in_be32(&immr->sysconf.spridr);
57 * determine_type() - Determine CPU family of MPC83xx device
58 * @dev: CPU device from which to read CPU family from
60 static inline void determine_family(struct udevice *dev)
62 struct mpc83xx_cpu_priv *priv = dev_get_priv(dev);
63 /* Upper 12 bits of PARTID field (bits 0-23 in SPRIDR) */
64 const u32 PARTID_FAMILY_MASK = 0xFFF00000;
66 switch (bitfield_extract_by_mask(get_spridr(), PARTID_FAMILY_MASK)) {
69 priv->family = FAMILY_830X;
72 priv->family = FAMILY_831X;
75 priv->family = FAMILY_832X;
78 priv->family = FAMILY_834X;
81 priv->family = FAMILY_836X;
84 priv->family = FAMILY_837X;
87 priv->family = FAMILY_UNKNOWN;
92 * determine_type() - Determine CPU type of MPC83xx device
93 * @dev: CPU device from which to read CPU type from
95 static inline void determine_type(struct udevice *dev)
97 struct mpc83xx_cpu_priv *priv = dev_get_priv(dev);
98 /* Upper 16 bits of PVR (Processor Version Register) */
99 const u32 PCR_UPPER_MASK = 0xFFFF0000;
102 val = bitfield_extract_by_mask(get_spridr(), PCR_UPPER_MASK);
104 /* Mask out E-variant bit */
105 switch (val & 0xFFFE) {
107 priv->type = TYPE_8308;
110 priv->type = TYPE_8309;
113 priv->type = TYPE_8311;
116 priv->type = TYPE_8313;
119 priv->type = TYPE_8314;
122 priv->type = TYPE_8315;
125 priv->type = TYPE_8321;
128 priv->type = TYPE_8323;
131 priv->type = TYPE_8343;
134 priv->type = TYPE_8347_TBGA;
137 priv->type = TYPE_8347_PBGA;
140 priv->type = TYPE_8349;
143 priv->type = TYPE_8358_TBGA;
146 priv->type = TYPE_8358_PBGA;
149 priv->type = TYPE_8360;
152 priv->type = TYPE_8377;
155 priv->type = TYPE_8378;
158 priv->type = TYPE_8379;
161 priv->type = TYPE_UNKNOWN;
166 * determine_e300_type() - Determine e300 core type of MPC83xx device
167 * @dev: CPU device from which to read e300 core type from
169 static inline void determine_e300_type(struct udevice *dev)
171 struct mpc83xx_cpu_priv *priv = dev_get_priv(dev);
172 /* Upper 16 bits of PVR (Processor Version Register) */
173 const u32 PCR_UPPER_MASK = 0xFFFF0000;
176 switch ((pvr & PCR_UPPER_MASK) >> 16) {
178 priv->e300_type = E300C1;
181 priv->e300_type = E300C2;
184 priv->e300_type = E300C3;
187 priv->e300_type = E300C4;
190 priv->e300_type = E300_UNKNOWN;
195 * determine_revid() - Determine revision ID of CPU device
196 * @dev: CPU device from which to read revision ID
198 static inline void determine_revid(struct udevice *dev)
200 struct mpc83xx_cpu_priv *priv = dev_get_priv(dev);
201 u32 REVID_MAJOR_MASK;
202 u32 REVID_MINOR_MASK;
203 u32 spridr = get_spridr();
205 if (priv->family == FAMILY_834X) {
206 REVID_MAJOR_MASK = 0x0000FF00;
207 REVID_MINOR_MASK = 0x000000FF;
209 REVID_MAJOR_MASK = 0x000000F0;
210 REVID_MINOR_MASK = 0x0000000F;
213 priv->revid.major = bitfield_extract_by_mask(spridr, REVID_MAJOR_MASK);
214 priv->revid.minor = bitfield_extract_by_mask(spridr, REVID_MINOR_MASK);
218 * determine_cpu_data() - Determine CPU information from hardware
219 * @dev: CPU device from which to read information
221 static void determine_cpu_data(struct udevice *dev)
223 struct mpc83xx_cpu_priv *priv = dev_get_priv(dev);
224 const u32 E_FLAG_MASK = 0x00010000;
225 u32 spridr = get_spridr();
227 determine_family(dev);
229 determine_e300_type(dev);
230 determine_revid(dev);
232 if ((priv->family == FAMILY_834X ||
233 priv->family == FAMILY_836X) && priv->revid.major >= 2)
234 priv->is_a_variant = true;
236 priv->is_e_processor = !bitfield_extract_by_mask(spridr, E_FLAG_MASK);
239 static int mpc83xx_cpu_get_desc(struct udevice *dev, char *buf, int size)
241 struct mpc83xx_cpu_priv *priv = dev_get_priv(dev);
248 ret = clk_get_by_index(dev, 0, &core_clk);
250 debug("%s: Failed to get core clock (err = %d)\n",
255 ret = clk_get_by_index(dev, 1, &csb_clk);
257 debug("%s: Failed to get CSB clock (err = %d)\n",
262 determine_cpu_data(dev);
265 "%s, MPC%s%s%s, Rev: %d.%d at %s MHz, CSB: %s MHz",
266 e300_names[priv->e300_type],
267 cpu_type_names[priv->type],
268 priv->is_e_processor ? "E" : "",
269 priv->is_a_variant ? "A" : "",
272 strmhz(core_freq, clk_get_rate(&core_clk)),
273 strmhz(csb_freq, clk_get_rate(&csb_clk)));
278 static int mpc83xx_cpu_get_info(struct udevice *dev, struct cpu_info *info)
284 ret = clk_get_by_index(dev, 0, &clock);
286 debug("%s: Failed to get core clock (err = %d)\n",
291 freq = clk_get_rate(&clock);
293 debug("%s: Core clock speed is zero\n", dev->name);
297 info->cpu_freq = freq;
298 info->features = BIT(CPU_FEAT_L1_CACHE) | BIT(CPU_FEAT_MMU);
303 static int mpc83xx_cpu_get_count(struct udevice *dev)
305 /* We have one e300cX core */
309 static int mpc83xx_cpu_get_vendor(struct udevice *dev, char *buf, int size)
311 snprintf(buf, size, "NXP");
316 static const struct cpu_ops mpc83xx_cpu_ops = {
317 .get_desc = mpc83xx_cpu_get_desc,
318 .get_info = mpc83xx_cpu_get_info,
319 .get_count = mpc83xx_cpu_get_count,
320 .get_vendor = mpc83xx_cpu_get_vendor,
323 static int mpc83xx_cpu_probe(struct udevice *dev)
328 static const struct udevice_id mpc83xx_cpu_ids[] = {
329 { .compatible = "fsl,mpc83xx", },
330 { .compatible = "fsl,mpc8308", },
331 { .compatible = "fsl,mpc8309", },
332 { .compatible = "fsl,mpc8313", },
333 { .compatible = "fsl,mpc8315", },
334 { .compatible = "fsl,mpc832x", },
335 { .compatible = "fsl,mpc8349", },
336 { .compatible = "fsl,mpc8360", },
337 { .compatible = "fsl,mpc8379", },
341 U_BOOT_DRIVER(mpc83xx_cpu) = {
342 .name = "mpc83xx_cpu",
344 .of_match = mpc83xx_cpu_ids,
345 .probe = mpc83xx_cpu_probe,
346 .priv_auto_alloc_size = sizeof(struct mpc83xx_cpu_priv),
347 .ops = &mpc83xx_cpu_ops,
348 .flags = DM_FLAG_PRE_RELOC,