diff options
Diffstat (limited to 'arch/powerpc/boot/cpm-serial.c')
| -rw-r--r-- | arch/powerpc/boot/cpm-serial.c | 87 |
1 files changed, 67 insertions, 20 deletions
diff --git a/arch/powerpc/boot/cpm-serial.c b/arch/powerpc/boot/cpm-serial.c index 1f6225aad29..19dc15abe43 100644 --- a/arch/powerpc/boot/cpm-serial.c +++ b/arch/powerpc/boot/cpm-serial.c @@ -11,6 +11,7 @@ #include "types.h" #include "io.h" #include "ops.h" +#include "page.h" struct cpm_scc { u32 gsmrl; @@ -42,6 +43,22 @@ struct cpm_param { u16 tbase; u8 rfcr; u8 tfcr; + u16 mrblr; + u32 rstate; + u8 res1[4]; + u16 rbptr; + u8 res2[6]; + u32 tstate; + u8 res3[4]; + u16 tbptr; + u8 res4[6]; + u16 maxidl; + u16 idlc; + u16 brkln; + u16 brkec; + u16 brkcr; + u16 rmask; + u8 res5[4]; }; struct cpm_bd { @@ -54,10 +71,10 @@ static void *cpcr; static struct cpm_param *param; static struct cpm_smc *smc; static struct cpm_scc *scc; -struct cpm_bd *tbdf, *rbdf; +static struct cpm_bd *tbdf, *rbdf; static u32 cpm_cmd; -static u8 *muram_start; -static u32 muram_offset; +static void *cbd_addr; +static u32 cbd_offset; static void (*do_cmd)(int op); static void (*enable_port)(void); @@ -119,20 +136,25 @@ static int cpm_serial_open(void) out_8(¶m->rfcr, 0x10); out_8(¶m->tfcr, 0x10); + out_be16(¶m->mrblr, 1); + out_be16(¶m->maxidl, 0); + out_be16(¶m->brkec, 0); + out_be16(¶m->brkln, 0); + out_be16(¶m->brkcr, 0); - rbdf = (struct cpm_bd *)muram_start; - rbdf->addr = (u8 *)(rbdf + 2); + rbdf = cbd_addr; + rbdf->addr = (u8 *)rbdf - 1; rbdf->sc = 0xa000; rbdf->len = 1; tbdf = rbdf + 1; - tbdf->addr = (u8 *)(rbdf + 2) + 1; + tbdf->addr = (u8 *)rbdf - 2; tbdf->sc = 0x2000; tbdf->len = 1; sync(); - out_be16(¶m->rbase, muram_offset); - out_be16(¶m->tbase, muram_offset + sizeof(struct cpm_bd)); + out_be16(¶m->rbase, cbd_offset); + out_be16(¶m->tbase, cbd_offset + sizeof(struct cpm_bd)); do_cmd(CPM_CMD_INIT_RX_TX); @@ -175,9 +197,12 @@ static unsigned char cpm_serial_getc(void) int cpm_console_init(void *devp, struct serial_console_data *scdp) { - void *reg_virt[2]; - int is_smc = 0, is_cpm2 = 0, n; + void *vreg[2]; + u32 reg[2]; + int is_smc = 0, is_cpm2 = 0; void *parent, *muram; + void *muram_addr; + unsigned long muram_offset, muram_size; if (dt_is_compatible(devp, "fsl,cpm1-smc-uart")) { is_smc = 1; @@ -201,19 +226,18 @@ int cpm_console_init(void *devp, struct serial_console_data *scdp) else do_cmd = cpm1_cmd; - n = getprop(devp, "fsl,cpm-command", &cpm_cmd, 4); - if (n < 4) + if (getprop(devp, "fsl,cpm-command", &cpm_cmd, 4) < 4) return -1; - if (dt_get_virtual_reg(devp, reg_virt, 2) < 2) + if (dt_get_virtual_reg(devp, vreg, 2) < 2) return -1; if (is_smc) - smc = reg_virt[0]; + smc = vreg[0]; else - scc = reg_virt[0]; + scc = vreg[0]; - param = reg_virt[1]; + param = vreg[1]; parent = get_parent(devp); if (!parent) @@ -227,17 +251,40 @@ int cpm_console_init(void *devp, struct serial_console_data *scdp) return -1; /* For bootwrapper-compatible device trees, we assume that the first - * entry has at least 18 bytes, and that #address-cells/#data-cells + * entry has at least 128 bytes, and that #address-cells/#data-cells * is one for both parent and child. */ - if (dt_get_virtual_reg(muram, (void **)&muram_start, 1) < 1) + if (dt_get_virtual_reg(muram, &muram_addr, 1) < 1) return -1; - n = getprop(muram, "reg", &muram_offset, 4); - if (n < 4) + if (getprop(muram, "reg", reg, 8) < 8) return -1; + muram_offset = reg[0]; + muram_size = reg[1]; + + /* Store the buffer descriptors at the end of the first muram chunk. + * For SMC ports on CPM2-based platforms, relocate the parameter RAM + * just before the buffer descriptors. + */ + + cbd_offset = muram_offset + muram_size - 2 * sizeof(struct cpm_bd); + + if (is_cpm2 && is_smc) { + u16 *smc_base = (u16 *)param; + u16 pram_offset; + + pram_offset = cbd_offset - 64; + pram_offset = _ALIGN_DOWN(pram_offset, 64); + + disable_port(); + out_be16(smc_base, pram_offset); + param = muram_addr - muram_offset + pram_offset; + } + + cbd_addr = muram_addr - muram_offset + cbd_offset; + scdp->open = cpm_serial_open; scdp->putc = cpm_serial_putc; scdp->getc = cpm_serial_getc; |