diff options
Diffstat (limited to 'arch/ppc/platforms/mpc8272ads_setup.c')
| -rw-r--r-- | arch/ppc/platforms/mpc8272ads_setup.c | 116 |
1 files changed, 115 insertions, 1 deletions
diff --git a/arch/ppc/platforms/mpc8272ads_setup.c b/arch/ppc/platforms/mpc8272ads_setup.c index bc9b94f77e39..abb7154de2c7 100644 --- a/arch/ppc/platforms/mpc8272ads_setup.c +++ b/arch/ppc/platforms/mpc8272ads_setup.c @@ -26,11 +26,35 @@ #include <asm/irq.h> #include <asm/ppc_sys.h> #include <asm/ppcboot.h> +#include <linux/fs_uart_pd.h> #include "pq2ads_pd.h" static void init_fcc1_ioports(void); static void init_fcc2_ioports(void); +static void init_scc1_uart_ioports(void); +static void init_scc4_uart_ioports(void); + +static struct fs_uart_platform_info mpc8272_uart_pdata[] = { + [fsid_scc1_uart] = { + .init_ioports = init_scc1_uart_ioports, + .fs_no = fsid_scc1_uart, + .brg = 1, + .tx_num_fifo = 4, + .tx_buf_size = 32, + .rx_num_fifo = 4, + .rx_buf_size = 32, + }, + [fsid_scc4_uart] = { + .init_ioports = init_scc4_uart_ioports, + .fs_no = fsid_scc4_uart, + .brg = 4, + .tx_num_fifo = 4, + .tx_buf_size = 32, + .rx_num_fifo = 4, + .rx_buf_size = 32, + }, +}; static struct fs_mii_bus_info mii_bus_info = { .method = fsmii_bitbang, @@ -201,12 +225,65 @@ static void __init mpc8272ads_fixup_enet_pdata(struct platform_device *pdev, } } +static void mpc8272ads_fixup_uart_pdata(struct platform_device *pdev, + int idx) +{ + bd_t *bd = (bd_t *) __res; + struct fs_uart_platform_info *pinfo; + int num = ARRAY_SIZE(mpc8272_uart_pdata); + int id = fs_uart_id_scc2fsid(idx); + + /* no need to alter anything if console */ + if ((id <= num) && (!pdev->dev.platform_data)) { + pinfo = &mpc8272_uart_pdata[id]; + pinfo->uart_clk = bd->bi_intfreq; + pdev->dev.platform_data = pinfo; + } +} + +static void init_scc1_uart_ioports(void) +{ + cpm2_map_t* immap = ioremap(CPM_MAP_ADDR, sizeof(cpm2_map_t)); + + /* SCC1 is only on port D */ + setbits32(&immap->im_ioport.iop_ppard,0x00000003); + clrbits32(&immap->im_ioport.iop_psord,0x00000001); + setbits32(&immap->im_ioport.iop_psord,0x00000002); + clrbits32(&immap->im_ioport.iop_pdird,0x00000001); + setbits32(&immap->im_ioport.iop_pdird,0x00000002); + + /* Wire BRG1 to SCC1 */ + clrbits32(&immap->im_cpmux.cmx_scr,0x00ffffff); + + iounmap(immap); +} + +static void init_scc4_uart_ioports(void) +{ + cpm2_map_t* immap = ioremap(CPM_MAP_ADDR, sizeof(cpm2_map_t)); + + setbits32(&immap->im_ioport.iop_ppard,0x00000600); + clrbits32(&immap->im_ioport.iop_psord,0x00000600); + clrbits32(&immap->im_ioport.iop_pdird,0x00000200); + setbits32(&immap->im_ioport.iop_pdird,0x00000400); + + /* Wire BRG4 to SCC4 */ + clrbits32(&immap->im_cpmux.cmx_scr,0x000000ff); + setbits32(&immap->im_cpmux.cmx_scr,0x0000001b); + + iounmap(immap); +} + static int mpc8272ads_platform_notify(struct device *dev) { static const struct platform_notify_dev_map dev_map[] = { { .bus_id = "fsl-cpm-fcc", - .rtn = mpc8272ads_fixup_enet_pdata + .rtn = mpc8272ads_fixup_enet_pdata, + }, + { + .bus_id = "fsl-cpm-scc:uart", + .rtn = mpc8272ads_fixup_uart_pdata, }, { .bus_id = NULL @@ -230,7 +307,44 @@ int __init mpc8272ads_init(void) ppc_sys_device_enable(MPC82xx_CPM_FCC1); ppc_sys_device_enable(MPC82xx_CPM_FCC2); + /* to be ready for console, let's attach pdata here */ +#ifdef CONFIG_SERIAL_CPM_SCC1 + ppc_sys_device_setfunc(MPC82xx_CPM_SCC1, PPC_SYS_FUNC_UART); + ppc_sys_device_enable(MPC82xx_CPM_SCC1); + +#endif + +#ifdef CONFIG_SERIAL_CPM_SCC4 + ppc_sys_device_setfunc(MPC82xx_CPM_SCC4, PPC_SYS_FUNC_UART); + ppc_sys_device_enable(MPC82xx_CPM_SCC4); +#endif + + return 0; } +/* + To prevent confusion, console selection is gross: + by 0 assumed SCC1 and by 1 assumed SCC4 + */ +struct platform_device* early_uart_get_pdev(int index) +{ + bd_t *bd = (bd_t *) __res; + struct fs_uart_platform_info *pinfo; + + struct platform_device* pdev = NULL; + if(index) { /*assume SCC4 here*/ + pdev = &ppc_sys_platform_devices[MPC82xx_CPM_SCC4]; + pinfo = &mpc8272_uart_pdata[fsid_scc4_uart]; + } else { /*over SCC1*/ + pdev = &ppc_sys_platform_devices[MPC82xx_CPM_SCC1]; + pinfo = &mpc8272_uart_pdata[fsid_scc1_uart]; + } + + pinfo->uart_clk = bd->bi_intfreq; + pdev->dev.platform_data = pinfo; + ppc_sys_fixup_mem_resource(pdev, CPM_MAP_ADDR); + return NULL; +} + arch_initcall(mpc8272ads_init); |