From: Vitaly Bordug Date: Fri, 20 Jan 2006 19:22:34 +0000 (+0300) Subject: [PATCH] ppc32: Make platform devices being able to assign functions X-Git-Tag: v2.6.17-rc1~1117^2~33 X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=75288c78c69020a574d93770c3a941b785f3d93d;p=linux-2.6 [PATCH] ppc32: Make platform devices being able to assign functions Implemented by modification of the .name field of the platform device, when PDs with the same names are to be used within different drivers, as -> : Corresponding drivers should change the .name in struct device_driver to reflect upper of course. Added ppc_sys_device_disable/enable function set, making it easier to disable all the inexistent/not utilized platform device way pdevs. By the check of the "disabled" bit in the config field of ppc_sys_specs, disabled platform devices will be either added/removed from the bus, or simply not registered on it, depending on the time when disable/enable call asserted. The default behaviour when nothing is disabled/enabled will be "all devices are enabled", which is the same as before. Also helper platform_notify_map function added, making assignment of board-specific platform_info more consistent and generic. Signed-off-by: Vitaly Bordug Signed-off-by: Marcelo Tosatti Signed-off-by: Paul Mackerras --- diff --git a/arch/ppc/syslib/ppc_sys.c b/arch/ppc/syslib/ppc_sys.c index c0b93c4191..879783a41c 100644 --- a/arch/ppc/syslib/ppc_sys.c +++ b/arch/ppc/syslib/ppc_sys.c @@ -15,11 +15,22 @@ */ #include +#include #include int (*ppc_sys_device_fixup) (struct platform_device * pdev); static int ppc_sys_inited; +static int ppc_sys_func_inited; + +static const char *ppc_sys_func_names[] = { + [PPC_SYS_FUNC_DUMMY] = "dummy", + [PPC_SYS_FUNC_ETH] = "eth", + [PPC_SYS_FUNC_UART] = "uart", + [PPC_SYS_FUNC_HLDC] = "hldc", + [PPC_SYS_FUNC_USB] = "usb", + [PPC_SYS_FUNC_IRDA] = "irda", +}; void __init identify_ppc_sys_by_id(u32 id) { @@ -38,13 +49,13 @@ void __init identify_ppc_sys_by_id(u32 id) void __init identify_ppc_sys_by_name(char *name) { unsigned int i = 0; - while (ppc_sys_specs[i].ppc_sys_name[0]) - { + while (ppc_sys_specs[i].ppc_sys_name[0]) { if (!strcmp(ppc_sys_specs[i].ppc_sys_name, name)) break; i++; } cur_ppc_sys_spec = &ppc_sys_specs[i]; + return; } @@ -128,6 +139,165 @@ void ppc_sys_device_remove(enum ppc_sys_devices dev) } } +/* Platform-notify mapping + * Helper function for BSP code to assign board-specific platfom-divice bits + */ + +void platform_notify_map(const struct platform_notify_dev_map *map, + struct device *dev) +{ + struct platform_device *pdev; + int len, idx; + const char *s; + + /* do nothing if no device or no bus_id */ + if (!dev || !dev->bus_id) + return; + + /* call per device map */ + while (map->bus_id != NULL) { + idx = -1; + s = strrchr(dev->bus_id, '.'); + if (s != NULL) + idx = (int)simple_strtol(s + 1, NULL, 10); + else + s = dev->bus_id; + + len = s - dev->bus_id; + + if (!strncmp(dev->bus_id, map->bus_id, len)) { + pdev = container_of(dev, struct platform_device, dev); + map->rtn(pdev, idx); + } + map++; + } +} + +/* + Function assignment stuff. + Intended to work as follows: + the device name defined in foo_devices.c will be concatenated with :"func", + where func is string map of respective function from platfom_device_func enum + + The PPC_SYS_FUNC_DUMMY function is intended to remove all assignments, making the device to appear + in platform bus with unmodified name. + */ + +/* + Here we'll replace .name pointers with fixed-lenght strings + Hereby, this should be called *before* any func stuff triggeded. + */ +void ppc_sys_device_initfunc(void) +{ + int i; + const char *name; + static char new_names[NUM_PPC_SYS_DEVS][BUS_ID_SIZE]; + enum ppc_sys_devices cur_dev; + + /* If inited yet, do nothing */ + if (ppc_sys_func_inited) + return; + + for (i = 0; i < cur_ppc_sys_spec->num_devices; i++) { + if ((cur_dev = cur_ppc_sys_spec->device_list[i]) < 0) + continue; + + if (ppc_sys_platform_devices[cur_dev].name) { + /*backup name */ + name = ppc_sys_platform_devices[cur_dev].name; + strlcpy(new_names[i], name, BUS_ID_SIZE); + ppc_sys_platform_devices[cur_dev].name = new_names[i]; + } + } + + ppc_sys_func_inited = 1; +} + +/*The "engine" of the func stuff. Here we either concat specified function string description + to the name, or remove it if PPC_SYS_FUNC_DUMMY parameter is passed here*/ +void ppc_sys_device_setfunc(enum ppc_sys_devices dev, + enum platform_device_func func) +{ + char *s; + char *name = (char *)ppc_sys_platform_devices[dev].name; + char tmp[BUS_ID_SIZE]; + + if (!ppc_sys_func_inited) { + printk(KERN_ERR "Unable to alter function - not inited!\n"); + return; + } + + if (ppc_sys_inited) { + platform_device_unregister(&ppc_sys_platform_devices[dev]); + } + + if ((s = (char *)strchr(name, ':')) != NULL) { /* reassign */ + /* Either change the name after ':' or remove func modifications */ + if (func != PPC_SYS_FUNC_DUMMY) + strlcpy(s + 1, ppc_sys_func_names[func], BUS_ID_SIZE); + else + *s = 0; + } else if (func != PPC_SYS_FUNC_DUMMY) { + /* do assignment if it is not just "clear" request */ + sprintf(tmp, "%s:%s", name, ppc_sys_func_names[func]); + strlcpy(name, tmp, BUS_ID_SIZE); + } + + if (ppc_sys_inited) { + platform_device_register(&ppc_sys_platform_devices[dev]); + } +} + +void ppc_sys_device_disable(enum ppc_sys_devices dev) +{ + BUG_ON(cur_ppc_sys_spec == NULL); + + /*Check if it is enabled*/ + if(!(cur_ppc_sys_spec->config[dev] & PPC_SYS_CONFIG_DISABLED)) { + if (ppc_sys_inited) { + platform_device_unregister(&ppc_sys_platform_devices[dev]); + } + cur_ppc_sys_spec->config[dev] |= PPC_SYS_CONFIG_DISABLED; + } +} + +void ppc_sys_device_enable(enum ppc_sys_devices dev) +{ + BUG_ON(cur_ppc_sys_spec == NULL); + + /*Check if it is disabled*/ + if(cur_ppc_sys_spec->config[dev] & PPC_SYS_CONFIG_DISABLED) { + if (ppc_sys_inited) { + platform_device_register(&ppc_sys_platform_devices[dev]); + } + cur_ppc_sys_spec->config[dev] &= ~PPC_SYS_CONFIG_DISABLED; + } + +} + +void ppc_sys_device_enable_all(void) +{ + enum ppc_sys_devices cur_dev; + int i; + + for (i = 0; i < cur_ppc_sys_spec->num_devices; i++) { + cur_dev = cur_ppc_sys_spec->device_list[i]; + ppc_sys_device_enable(cur_dev); + } +} + +void ppc_sys_device_disable_all(void) +{ + enum ppc_sys_devices cur_dev; + int i; + + for (i = 0; i < cur_ppc_sys_spec->num_devices; i++) { + cur_dev = cur_ppc_sys_spec->device_list[i]; + ppc_sys_device_disable(cur_dev); + } +} + + static int __init ppc_sys_init(void) { unsigned int i, dev_id, ret = 0; @@ -136,7 +306,8 @@ static int __init ppc_sys_init(void) for (i = 0; i < cur_ppc_sys_spec->num_devices; i++) { dev_id = cur_ppc_sys_spec->device_list[i]; - if (dev_id != -1) { + if ((dev_id != -1) && + !(cur_ppc_sys_spec->config[dev_id] & PPC_SYS_CONFIG_DISABLED)) { if (ppc_sys_device_fixup != NULL) ppc_sys_device_fixup(&ppc_sys_platform_devices [dev_id]); diff --git a/include/asm-ppc/mpc10x.h b/include/asm-ppc/mpc10x.h index 77b1e092c2..976ad3d94f 100644 --- a/include/asm-ppc/mpc10x.h +++ b/include/asm-ppc/mpc10x.h @@ -165,6 +165,7 @@ enum ppc_sys_devices { MPC10X_DMA1, MPC10X_UART0, MPC10X_UART1, + NUM_PPC_SYS_DEVS, }; int mpc10x_bridge_init(struct pci_controller *hose, diff --git a/include/asm-ppc/mpc52xx.h b/include/asm-ppc/mpc52xx.h index a055e0756b..6167f74635 100644 --- a/include/asm-ppc/mpc52xx.h +++ b/include/asm-ppc/mpc52xx.h @@ -60,6 +60,7 @@ enum ppc_sys_devices { MPC52xx_ATA, MPC52xx_I2C1, MPC52xx_I2C2, + NUM_PPC_SYS_DEVS, }; diff --git a/include/asm-ppc/mpc8260.h b/include/asm-ppc/mpc8260.h index 3214526950..6ba69a86b9 100644 --- a/include/asm-ppc/mpc8260.h +++ b/include/asm-ppc/mpc8260.h @@ -83,6 +83,7 @@ enum ppc_sys_devices { MPC82xx_CPM_SMC2, MPC82xx_CPM_USB, MPC82xx_SEC1, + NUM_PPC_SYS_DEVS, }; #ifndef __ASSEMBLY__ diff --git a/include/asm-ppc/mpc83xx.h b/include/asm-ppc/mpc83xx.h index 7cdf60fa69..3c23fc43bf 100644 --- a/include/asm-ppc/mpc83xx.h +++ b/include/asm-ppc/mpc83xx.h @@ -108,6 +108,7 @@ enum ppc_sys_devices { MPC83xx_USB2_DR, MPC83xx_USB2_MPH, MPC83xx_MDIO, + NUM_PPC_SYS_DEVS, }; #endif /* CONFIG_83xx */ diff --git a/include/asm-ppc/mpc85xx.h b/include/asm-ppc/mpc85xx.h index c8a96aa44f..f47002a60e 100644 --- a/include/asm-ppc/mpc85xx.h +++ b/include/asm-ppc/mpc85xx.h @@ -139,6 +139,7 @@ enum ppc_sys_devices { MPC85xx_eTSEC4, MPC85xx_IIC2, MPC85xx_MDIO, + NUM_PPC_SYS_DEVS, }; /* Internal interrupts are all Level Sensitive, and Positive Polarity */ diff --git a/include/asm-ppc/mpc8xx.h b/include/asm-ppc/mpc8xx.h index 73ec9a6db0..3515a7fa6c 100644 --- a/include/asm-ppc/mpc8xx.h +++ b/include/asm-ppc/mpc8xx.h @@ -111,6 +111,7 @@ enum ppc_sys_devices { MPC8xx_CPM_SMC1, MPC8xx_CPM_SMC2, MPC8xx_CPM_USB, + NUM_PPC_SYS_DEVS, }; #define PPC_PIN_SIZE (24 * 1024 * 1024) /* 24Mbytes of data pinned */ diff --git a/include/asm-ppc/ppc_sys.h b/include/asm-ppc/ppc_sys.h index bdc4dde35e..4b94f7059e 100644 --- a/include/asm-ppc/ppc_sys.h +++ b/include/asm-ppc/ppc_sys.h @@ -46,9 +46,26 @@ struct ppc_sys_spec { u32 value; u32 num_devices; char *ppc_sys_name; + u8 config[NUM_PPC_SYS_DEVS]; enum ppc_sys_devices *device_list; }; +struct platform_notify_dev_map { + const char *bus_id; + void (*rtn)(struct platform_device * pdev, int idx); +}; + +enum platform_device_func { + PPC_SYS_FUNC_DUMMY = 0, + PPC_SYS_FUNC_ETH = 1, + PPC_SYS_FUNC_UART = 2, + PPC_SYS_FUNC_HLDC = 3, + PPC_SYS_FUNC_USB = 4, + PPC_SYS_FUNC_IRDA = 5, +}; + +#define PPC_SYS_CONFIG_DISABLED 1 + /* describes all specific chips and which devices they have on them */ extern struct ppc_sys_spec ppc_sys_specs[]; extern struct ppc_sys_spec *cur_ppc_sys_spec; @@ -74,5 +91,20 @@ extern void *ppc_sys_get_pdata(enum ppc_sys_devices dev) __init; /* remove a device from the system */ extern void ppc_sys_device_remove(enum ppc_sys_devices dev); +/* Function assignment stuff */ +void ppc_sys_device_initfunc(void); +void ppc_sys_device_setfunc(enum ppc_sys_devices dev, + enum platform_device_func func); +void ppc_sys_device_set_func_all(enum platform_device_func func); + +void platform_notify_map(const struct platform_notify_dev_map *map, + struct device *dev); + +/* Enable / disable stuff */ +void ppc_sys_device_disable(enum ppc_sys_devices dev); +void ppc_sys_device_enable(enum ppc_sys_devices dev); +void ppc_sys_device_enable_all(void); +void ppc_sys_device_disable_all(void); + #endif /* __ASM_PPC_SYS_H */ #endif /* __KERNEL__ */