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42392849 NM |
1 | /* |
2 | * (C) Copyright 2015-2016 | |
3 | * Texas Instruments Incorporated - http://www.ti.com/ | |
4 | * SPDX-License-Identifier: GPL-2.0+ | |
5 | */ | |
6 | #define pr_fmt(fmt) "%s: " fmt, __func__ | |
7 | #include <common.h> | |
8 | #include <dm.h> | |
9 | #include <errno.h> | |
10 | #include <fdtdec.h> | |
11 | #include <remoteproc.h> | |
12 | #include <mach/psc_defs.h> | |
13 | ||
14 | DECLARE_GLOBAL_DATA_PTR; | |
15 | ||
16 | /** | |
17 | * struct ti_powerproc_privdata - power processor private data | |
18 | * @loadaddr: base address for loading the power processor | |
19 | * @psc_module: psc module address. | |
20 | */ | |
21 | struct ti_powerproc_privdata { | |
22 | phys_addr_t loadaddr; | |
23 | u32 psc_module; | |
24 | }; | |
25 | ||
26 | /** | |
27 | * ti_of_to_priv() - generate private data from device tree | |
28 | * @dev: corresponding ti remote processor device | |
29 | * @priv: pointer to driver specific private data | |
30 | * | |
31 | * Return: 0 if all went ok, else corresponding -ve error | |
32 | */ | |
33 | static int ti_of_to_priv(struct udevice *dev, | |
34 | struct ti_powerproc_privdata *priv) | |
35 | { | |
e160f7d4 | 36 | int node = dev_of_offset(dev); |
42392849 NM |
37 | const void *blob = gd->fdt_blob; |
38 | int tmp; | |
39 | ||
40 | if (!blob) { | |
41 | debug("'%s' no dt?\n", dev->name); | |
42 | return -EINVAL; | |
43 | } | |
44 | ||
45 | priv->loadaddr = fdtdec_get_addr(blob, node, "reg"); | |
46 | if (priv->loadaddr == FDT_ADDR_T_NONE) { | |
47 | debug("'%s': no 'reg' property\n", dev->name); | |
48 | return -EINVAL; | |
49 | } | |
50 | ||
51 | tmp = fdtdec_get_int(blob, node, "ti,lpsc_module", -EINVAL); | |
52 | if (tmp < 0) { | |
53 | debug("'%s': no 'ti,lpsc_module' property\n", dev->name); | |
54 | return tmp; | |
55 | } | |
56 | priv->psc_module = tmp; | |
57 | ||
58 | return 0; | |
59 | } | |
60 | ||
61 | /** | |
62 | * ti_powerproc_probe() - Basic probe | |
63 | * @dev: corresponding ti remote processor device | |
64 | * | |
65 | * Return: 0 if all went ok, else corresponding -ve error | |
66 | */ | |
67 | static int ti_powerproc_probe(struct udevice *dev) | |
68 | { | |
69 | struct dm_rproc_uclass_pdata *uc_pdata; | |
70 | struct ti_powerproc_privdata *priv; | |
71 | int ret; | |
72 | ||
73 | uc_pdata = dev_get_uclass_platdata(dev); | |
74 | priv = dev_get_priv(dev); | |
75 | ||
76 | ret = ti_of_to_priv(dev, priv); | |
77 | ||
78 | debug("%s probed with slave_addr=0x%08lX module=%d(%d)\n", | |
79 | uc_pdata->name, priv->loadaddr, priv->psc_module, ret); | |
80 | ||
81 | return ret; | |
82 | } | |
83 | ||
84 | /** | |
85 | * ti_powerproc_load() - Loadup the TI remote processor | |
86 | * @dev: corresponding ti remote processor device | |
87 | * @addr: Address in memory where image binary is stored | |
88 | * @size: Size in bytes of the image binary | |
89 | * | |
90 | * Return: 0 if all went ok, else corresponding -ve error | |
91 | */ | |
92 | static int ti_powerproc_load(struct udevice *dev, ulong addr, ulong size) | |
93 | { | |
94 | struct dm_rproc_uclass_pdata *uc_pdata; | |
95 | struct ti_powerproc_privdata *priv; | |
96 | int ret; | |
97 | ||
98 | uc_pdata = dev_get_uclass_platdata(dev); | |
99 | if (!uc_pdata) { | |
100 | debug("%s: no uc pdata!\n", dev->name); | |
101 | return -EINVAL; | |
102 | } | |
103 | ||
104 | priv = dev_get_priv(dev); | |
105 | ret = psc_module_keep_in_reset_enabled(priv->psc_module, false); | |
106 | if (ret) { | |
107 | debug("%s Unable to disable module '%d'(ret=%d)\n", | |
108 | uc_pdata->name, priv->psc_module, ret); | |
109 | return ret; | |
110 | } | |
111 | ||
112 | debug("%s: Loading binary from 0x%08lX, size 0x%08lX to 0x%08lX\n", | |
113 | uc_pdata->name, addr, size, priv->loadaddr); | |
114 | ||
115 | memcpy((void *)priv->loadaddr, (void *)addr, size); | |
116 | ||
117 | debug("%s: Complete!\n", uc_pdata->name); | |
118 | return 0; | |
119 | } | |
120 | ||
121 | /** | |
122 | * ti_powerproc_start() - (replace: short desc) | |
123 | * @dev: corresponding ti remote processor device | |
124 | * | |
125 | * Return: 0 if all went ok, else corresponding -ve error | |
126 | */ | |
127 | static int ti_powerproc_start(struct udevice *dev) | |
128 | { | |
129 | struct dm_rproc_uclass_pdata *uc_pdata; | |
130 | struct ti_powerproc_privdata *priv; | |
131 | int ret; | |
132 | ||
133 | uc_pdata = dev_get_uclass_platdata(dev); | |
134 | if (!uc_pdata) { | |
135 | debug("%s: no uc pdata!\n", dev->name); | |
136 | return -EINVAL; | |
137 | } | |
138 | ||
139 | priv = dev_get_priv(dev); | |
140 | ret = psc_disable_module(priv->psc_module); | |
141 | if (ret) { | |
142 | debug("%s Unable to disable module '%d'(ret=%d)\n", | |
143 | uc_pdata->name, priv->psc_module, ret); | |
144 | return ret; | |
145 | } | |
146 | ||
147 | ret = psc_module_release_from_reset(priv->psc_module); | |
148 | if (ret) { | |
149 | debug("%s Failed to wait for module '%d'(ret=%d)\n", | |
150 | uc_pdata->name, priv->psc_module, ret); | |
151 | return ret; | |
152 | } | |
153 | ret = psc_enable_module(priv->psc_module); | |
154 | if (ret) { | |
155 | debug("%s Unable to disable module '%d'(ret=%d)\n", | |
156 | uc_pdata->name, priv->psc_module, ret); | |
157 | return ret; | |
158 | } | |
159 | ||
160 | return 0; | |
161 | } | |
162 | ||
163 | static const struct dm_rproc_ops ti_powerproc_ops = { | |
164 | .load = ti_powerproc_load, | |
165 | .start = ti_powerproc_start, | |
166 | }; | |
167 | ||
168 | static const struct udevice_id ti_powerproc_ids[] = { | |
169 | {.compatible = "ti,power-processor"}, | |
170 | {} | |
171 | }; | |
172 | ||
173 | U_BOOT_DRIVER(ti_powerproc) = { | |
174 | .name = "ti_power_proc", | |
175 | .of_match = ti_powerproc_ids, | |
176 | .id = UCLASS_REMOTEPROC, | |
177 | .ops = &ti_powerproc_ops, | |
178 | .probe = ti_powerproc_probe, | |
179 | .priv_auto_alloc_size = sizeof(struct ti_powerproc_privdata), | |
180 | }; |